Plain-English reference for home appliance error codes, published against the model family that defines them. What each code means, how urgent it is, and what is safe to check yourself.https://blinklookup.com/en-usSat, 26 Sep 2026 00:00:00 GMThttps://blinklookup.com/washer/lg/washer/status-cd/https://blinklookup.com/washer/lg/washer/status-cd/Not a fault. The cooling step that lets the load cool before the door unlocks has finished, and the message stays up until the clothes are removed or the machine is started again.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineLGnot-a-faulthttps://blinklookup.com/washer/lg/washer/status-cl/https://blinklookup.com/washer/lg/washer/status-cl/Not a fault. Child lock deliberately freezes the control panel so settings cannot be changed, and holding the child lock control for a few seconds releases it.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineLGnot-a-faulthttps://blinklookup.com/washer/lg/washer/status-dr/https://blinklookup.com/washer/lg/washer/status-dr/Not a fault. The cycle was left paused for more than about four minutes, so the machine abandoned the cycle and drained the tub so the door could be opened. The drain is working correctly, which is what the code is reporting.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineLGnot-a-faulthttps://blinklookup.com/washer/lg/washer/status-tcl/https://blinklookup.com/washer/lg/washer/status-tcl/Not a fault. The machine is telling you the tub clean cycle has not been run often enough and that residue is building up. Running it takes an hour with no clothes and an empty drum.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineLGnot-a-faulthttps://blinklookup.com/washer/lg/washer/error-code-ce/https://blinklookup.com/washer/lg/washer/error-code-ce/The control measured a motor current outside what it expects, usually an overload or a drive fault. A genuinely overloaded drum and a failing drive module both produce it, so the load is worth checking before parts are ordered.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineLGhighhttps://blinklookup.com/washer/lg/washer/error-code-de/https://blinklookup.com/washer/lg/washer/error-code-de/The control could not confirm the door is closed and locked. Opening and closing the door firmly and restarting clears most of these, because a sock caught in the gasket is the usual cause rather than a failed lock.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineLGmoderatehttps://blinklookup.com/washer/lg/washer/error-code-dl/https://blinklookup.com/washer/lg/washer/error-code-dl/The lock released or failed to engage partway through a cycle rather than at the start. A code that only happens mid-cycle points at the lock mechanism itself rather than at something caught in the door.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineLGmoderatehttps://blinklookup.com/washer/lg/washer/error-code-e6/https://blinklookup.com/washer/lg/washer/error-code-e6/The part that switches a top loader between agitation and spin has trouble, often because something is jammed between the pulsator and the tub. A repeated code here is not a reset problem and needs the agitator area opened up.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineLGhighhttps://blinklookup.com/washer/lg/washer/error-code-fe/https://blinklookup.com/washer/lg/washer/error-code-fe/The level rose higher than the cycle ever requested, and the machine keeps filling until you notice. An inlet valve that is not closing fully explains both this and the more confusing symptom of a drum that fills while the machine is switched off.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineLGcriticalhttps://blinklookup.com/washer/lg/washer/error-code-ff/https://blinklookup.com/washer/lg/washer/error-code-ff/The control found a frozen condition it cannot work with, which on this brand means the inlet or drain has frozen at a point where it leaves the cabinet. It shows up in a garage, a porch, or an unheated room.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineLGhighhttps://blinklookup.com/washer/lg/washer/error-code-ie/https://blinklookup.com/washer/lg/washer/error-code-ie/The water did not reach the level the cycle needs within the time the control allows. On this brand that is almost always a tap, a hose, or an inlet screen, and it is one of the few faults worth sorting out in a few minutes rather than replacing a part.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineLGhighhttps://blinklookup.com/washer/lg/washer/error-code-le/https://blinklookup.com/washer/lg/washer/error-code-le/The drive could not turn properly, which on this brand is often one overloaded drum rather than a failed motor. Leave the machine to cool for half an hour and restart, and if it keeps coming back the motor position sensor is the likely part.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineLGhighhttps://blinklookup.com/washer/lg/washer/error-code-oe/https://blinklookup.com/washer/lg/washer/error-code-oe/The pump ran and the control could not confirm the tub emptied in time. The drain pump filter behind the lower front panel is the first thing to check, because it clears the majority of these on its own.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineLGhighhttps://blinklookup.com/washer/lg/washer/error-code-pe/https://blinklookup.com/washer/lg/washer/error-code-pe/The pressure sensor that tells the machine how much water it is holding is malfunctioning. A machine installed in a humid bathroom can produce this from moisture in the air, and unplugging for a few minutes resets the glitch cases.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineLGhighhttps://blinklookup.com/washer/lg/washer/error-code-pf/https://blinklookup.com/washer/lg/washer/error-code-pf/Power to the machine was interrupted mid-cycle and the control logged it. It clears on a restart, and it only becomes interesting when it happens with no outage behind it.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineLGmoderatehttps://blinklookup.com/washer/lg/washer/error-code-sud/https://blinklookup.com/washer/lg/washer/error-code-sud/The machine stopped because foam built up faster than it could absorb and drain. The control may add a suds reducing cycle, which adds a couple of hours, and the underlying cause is a dose that is too large or a non-HE formula.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineLGlowhttps://blinklookup.com/washer/lg/washer/error-code-te/https://blinklookup.com/washer/lg/washer/error-code-te/The heating sensing is returning readings the control cannot use, so heated cycles stop. A reset covers the occasional case and a thermistor is the part when it keeps returning.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineLGhighhttps://blinklookup.com/washer/lg/washer/error-code-ue/https://blinklookup.com/washer/lg/washer/error-code-ue/Laundry has piled up on one side of the drum and the machine will not risk spinning it. A single comforter or a rug defeats any balancing routine, and a machine that reports this on every load is usually a machine that is not level.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineLGlowhttps://blinklookup.com/washer/lg/washer/error-code-vs/https://blinklookup.com/washer/lg/washer/error-code-vs/The machine senses how the load is moving and this reading has failed. On direct-drive machines the sensor shares a circuit with the drive, so a code here needs the machine checked rather than the sensor replaced on its own.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineLGhighhttps://blinklookup.com/washer/samsung/washer/status-cb/https://blinklookup.com/washer/samsung/washer/status-cb/Not a fault. The control is measuring the drum against a reference so it knows what a normal cycle looks like, and the machine has to be left alone until it finishes. See the manual for how long to allow.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsungnot-a-faulthttps://blinklookup.com/washer/samsung/washer/status-cl/https://blinklookup.com/washer/samsung/washer/status-cl/Not a fault. With child lock on and water still in the tub, opening the door within thirty seconds makes the machine drain rather than hold a locked tub, and CL is how it reports that it did so.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsungnot-a-faulthttps://blinklookup.com/washer/samsung/washer/status-dn/https://blinklookup.com/washer/samsung/washer/status-dn/Not a fault. The machine is updating its own firmware and has to stay connected to power until it finishes. Cutting the power mid-download is what turns a routine update into a service call.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsungnot-a-faulthttps://blinklookup.com/washer/samsung/washer/error-code-1e/https://blinklookup.com/washer/samsung/washer/error-code-1e/The level sensor or the pressure switch has gone open, shorted, or is reporting a value the control does not accept. On many models this is the first sign of a detached or cracked level hose in the base.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsunghighhttps://blinklookup.com/washer/samsung/washer/error-code-3c/https://blinklookup.com/washer/samsung/washer/error-code-3c/The motor fault on displays that use C in the second position. On a belt-driven model check the belt and the pulley before assuming the motor itself has failed.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsunghighhttps://blinklookup.com/washer/samsung/washer/error-code-3e/https://blinklookup.com/washer/samsung/washer/error-code-3e/The drive could not get the drum turning, and on many models this is where a motor or hall sensor fault appears. Read the manual carefully, because on a number of Samsung washers the same three characters are a voltage code instead.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsunghighhttps://blinklookup.com/washer/samsung/washer/error-code-4c/https://blinklookup.com/washer/samsung/washer/error-code-4c/The water supply fault on machines that use C rather than E in the second position. Same fault as 4E, and the checks are identical: tap, hose, inlet screen, then the valve itself.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsunghighhttps://blinklookup.com/washer/samsung/washer/error-code-4c2/https://blinklookup.com/washer/samsung/washer/error-code-4c2/The control measured the incoming water and found it above the range it accepts for this fill. The usual cause on a hot and cold machine is the two inlet hoses fitted to the wrong taps.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsungmoderatehttps://blinklookup.com/washer/samsung/washer/error-code-4e/https://blinklookup.com/washer/samsung/washer/error-code-4e/The valve opened and the control timed out waiting for the level it wanted in the tub. On this machine 4E is the primary not-filling code, and it means the same thing as 4C on a neighbour with a different display layout.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsunghighhttps://blinklookup.com/washer/samsung/washer/error-code-5e/https://blinklookup.com/washer/samsung/washer/error-code-5e/The pump ran for its allotted time and the level sensor still saw water in the tub, so the machine stopped rather than lock a full drum. This is the most common Samsung washer fault and the first thing to check is the pump filter.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsunghighhttps://blinklookup.com/washer/samsung/washer/error-code-6e/https://blinklookup.com/washer/samsung/washer/error-code-6e/One of the more model-dependent codes on a Samsung washer. Some manuals read it as a stuck control button, others as a motor speed sensor or a spin that will not build speed, so confirm against the manual for your model before ordering anything.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsunglowhttps://blinklookup.com/washer/samsung/washer/error-code-7e/https://blinklookup.com/washer/samsung/washer/error-code-7e/The silver-ion treatment hardware in the drum could not be confirmed as present, so the control cancels the cycle that depends on it. The cycle will not start on any other programme, which tells you the drum itself is healthy.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsungmoderatehttps://blinklookup.com/washer/samsung/washer/error-code-8c/https://blinklookup.com/washer/samsung/washer/error-code-8c/The sensor fault on displays that use C rather than E. Watch the drum during the wash step: if it is not tumbling freely, the reading the sensor has produced is a real symptom rather than a false one.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsunghighhttps://blinklookup.com/washer/samsung/washer/error-code-8e/https://blinklookup.com/washer/samsung/washer/error-code-8e/The machine senses how the load is moving with a motion sensor, and a reading that stays flat when the drum should be tumbling tells the control something has failed. On some models the same characters are labelled an over-current error, so check the manual for your model before ordering parts.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsunghighhttps://blinklookup.com/washer/samsung/washer/error-code-9c/https://blinklookup.com/washer/samsung/washer/error-code-9c/The control saw incoming power outside the range it can work with. A trailing digit narrows it down, so 9C1 and 9C2 are both supply faults rather than a sensor problem.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsungmoderatehttps://blinklookup.com/washer/samsung/washer/error-code-ac/https://blinklookup.com/washer/samsung/washer/error-code-ac/Two parts of the machine that have to exchange messages stopped doing so, so the control reports the loss instead of guessing at a mechanical cause. A trailing digit identifies which link in the machine failed.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsunghighhttps://blinklookup.com/washer/samsung/washer/error-code-ae/https://blinklookup.com/washer/samsung/washer/error-code-ae/The same internal communication loss on displays that use E in the second position. A leading A with a trailing E such as AE6 or AEB is the same family, and AE3 specifically is a modem ready error rather than a board link.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsunghighhttps://blinklookup.com/washer/samsung/washer/error-code-dc/https://blinklookup.com/washer/samsung/washer/error-code-dc/The door fault on displays that use C in the second position. A leading 1 or 2 tells you which of two doors on a FlexWash or AddWash pair reported it.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsungmoderatehttps://blinklookup.com/washer/samsung/washer/error-code-de/https://blinklookup.com/washer/samsung/washer/error-code-de/The control ran its lock routine and did not get the confirmation it expected, so it treats the door as unlocked. On a washer that often means the machine will drain rather than hold a locked door full of hot water.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsungmoderatehttps://blinklookup.com/washer/samsung/washer/error-code-e2/https://blinklookup.com/washer/samsung/washer/error-code-e2/A key on the panel reported held down for longer than the control expects. Pushing start on a machine that thinks a button is stuck is often what the code is asking you to stop doing.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsunglowhttps://blinklookup.com/washer/samsung/washer/error-code-fe/https://blinklookup.com/washer/samsung/washer/error-code-fe/The fan the machine uses to move air through the duct work reported a problem. On a washer this shows up as a noise with the drum stationary, and the fan circuit is checked before the drive motor.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsunghighhttps://blinklookup.com/washer/samsung/washer/error-code-he/https://blinklookup.com/washer/samsung/washer/error-code-he/The control called for heat, confirmed the temperature was not rising, and shut the heater circuit down. This machine uses a sealed flow-through heater rather than an element bolted to the tub, so the part is not user serviceable.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsunghighhttps://blinklookup.com/washer/samsung/washer/error-code-oc/https://blinklookup.com/washer/samsung/washer/error-code-oc/The same over-level fault on displays that use a C for the second character. Water is being pumped out faster than the control likes, which usually means a blocked drain rather than a runaway fill.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsungcriticalhttps://blinklookup.com/washer/samsung/washer/error-code-oe/https://blinklookup.com/washer/samsung/washer/error-code-oe/The level reading went above what the control expects and the machine diverted water out rather than risk running the drum over the door seal. The letter here is an O, not a zero, and the code is often typed as 0E or 0C.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsungcriticalhttps://blinklookup.com/washer/samsung/washer/error-code-sud/https://blinklookup.com/washer/samsung/washer/error-code-sud/Foam built up faster than the machine could absorb and drain it, so the control stopped. A non-HE formula in a machine that needs HE detergent is the usual reason, and the machine may show 5D or 5UD for the same thing.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsunglowhttps://blinklookup.com/washer/samsung/washer/error-code-te/https://blinklookup.com/washer/samsung/washer/error-code-te/The thermistor has gone open, shorted, or is reporting a value the control cannot use for the current stage. An upside-down F on the display is meant to read as a lowercase t, which is why these codes are often typed TE or t0.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsunghighhttps://blinklookup.com/washer/samsung/washer/error-code-uc/https://blinklookup.com/washer/samsung/washer/error-code-uc/Power was interrupted or dipped while the machine was running, and the control recorded it. This one is often simply the after-effect of a power cut rather than a fault you can trace to a part.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsungmoderatehttps://blinklookup.com/washer/samsung/washer/error-code-ue/https://blinklookup.com/washer/samsung/washer/error-code-ue/The motor tried to reach spin speed and the control saw the tub loading up on one side, so it stopped. A single comforter or a rug in the drum is the usual cause and redistributing the wet load clears it.Sat, 26 Sep 2026 00:00:00 GMTWashing MachineSamsunglowhttps://blinklookup.com/dryer/lg/dryer/status-cl/https://blinklookup.com/dryer/lg/dryer/status-cl/Not a fault. The control panel is locked so a child cannot start a heated cycle, and it releases with the same hold that set it.Sat, 26 Sep 2026 00:00:00 GMTDryerLGnot-a-faulthttps://blinklookup.com/dryer/lg/dryer/error-code-d80/https://blinklookup.com/dryer/lg/dryer/error-code-d80/The milder Flow Sense warning, which means the dryer keeps running but dries slowly. Treat it as a yearly vent cleaning reminder rather than a fault, because it is the machine telling you the restriction is still growing.Sat, 26 Sep 2026 00:00:00 GMTDryerLGmoderatehttps://blinklookup.com/dryer/lg/dryer/error-code-d90/https://blinklookup.com/dryer/lg/dryer/error-code-d90/Flow Sense measured the exhaust as almost completely restricted, and the machine cools down and stops rather than keep heating into a blocked duct. This is the single most important code to act on in a dryer, because lint in a duct is combustible and a blocked vent is exactly how that fire starts.Sat, 26 Sep 2026 00:00:00 GMTDryerLGhighhttps://blinklookup.com/dryer/lg/dryer/error-code-de/https://blinklookup.com/dryer/lg/dryer/error-code-de/The door switch is not confirming the door is shut, and the machine will not start a cycle with a door it does not trust. A door that has dropped slightly out of square, or a strike that has worn, produces it repeatedly.Sat, 26 Sep 2026 00:00:00 GMTDryerLGmoderatehttps://blinklookup.com/dryer/lg/dryer/error-code-e13/https://blinklookup.com/dryer/lg/dryer/error-code-e13/On a hybrid condensing dryer, water from the sump has to drain away or the cycle cannot finish. An extended drain hose raises the resistance enough to trigger this, which is why the manufacturer specifies its own hose and no other.Sat, 26 Sep 2026 00:00:00 GMTDryerLGhighhttps://blinklookup.com/dryer/lg/dryer/error-code-f0/https://blinklookup.com/dryer/lg/dryer/error-code-f0/The machine has flagged the lint screen as obstructed, usually after a fixed interval of cycles. Holding the filter up to a light is the quickest test: a filter that blocks most of the light is a filter that needs cleaning now.Sat, 26 Sep 2026 00:00:00 GMTDryerLGmoderatehttps://blinklookup.com/dryer/lg/dryer/error-code-gas/https://blinklookup.com/dryer/lg/dryer/error-code-gas/The dryer asked for heat and the gas valve did not open, so the burner never lit and the machine stopped. The supply valve and the electrical side of the gas valve are both worth checking, and neither is an owner-level job.Sat, 26 Sep 2026 00:00:00 GMTDryerLGcriticalhttps://blinklookup.com/dryer/lg/dryer/error-code-hs/https://blinklookup.com/dryer/lg/dryer/error-code-hs/The moisture sensor that decides when the load is dry is not reporting. The machine falls back on a fixed cycle of around two and a half hours when this happens, which is why a code here shows up as every load suddenly taking the same long time.Sat, 26 Sep 2026 00:00:00 GMTDryerLGhighhttps://blinklookup.com/dryer/lg/dryer/error-code-le1/https://blinklookup.com/dryer/lg/dryer/error-code-le1/The drive could not start or stopped unexpectedly, and on this brand it is usually the blower being blocked rather than the motor itself. A washer stacked on top of a dryer, or a machine that has not been moved in years, is enough to do it.Sat, 26 Sep 2026 00:00:00 GMTDryerLGhighhttps://blinklookup.com/dryer/lg/dryer/error-code-np/https://blinklookup.com/dryer/lg/dryer/error-code-np/The machine cannot see current flowing to the heater, which on an electric dryer usually means an open leg on the 240 volt supply. It is a home wiring or receptacle problem more often than a dryer part, and it belongs with an electrician.Sat, 26 Sep 2026 00:00:00 GMTDryerLGhighhttps://blinklookup.com/dryer/lg/dryer/error-code-pf/https://blinklookup.com/dryer/lg/dryer/error-code-pf/Power was cut mid-cycle and the control logged it. Clearing it takes a reset, and a PF that appears with no outage behind it points at the supply rather than at the dryer.Sat, 26 Sep 2026 00:00:00 GMTDryerLGmoderatehttps://blinklookup.com/dryer/lg/dryer/error-code-ps/https://blinklookup.com/dryer/lg/dryer/error-code-ps/The red and white conductors are connected to the wrong terminals on the dryer block, so the machine sees an improper supply and refuses to heat. It is a real fault rather than a nuisance code, and correcting the terminal block is licensed work at 240 volts.Sat, 26 Sep 2026 00:00:00 GMTDryerLGhighhttps://blinklookup.com/dryer/lg/dryer/error-code-te1/https://blinklookup.com/dryer/lg/dryer/error-code-te1/The thermistor at the drum outlet is out of order, which is the sensor that tells the machine what temperature the air leaving the drum actually is. A blocked vent pushes that sensor out of range on its own, so clean the vent before ordering the part.Sat, 26 Sep 2026 00:00:00 GMTDryerLGhighhttps://blinklookup.com/dryer/lg/dryer/error-code-te2/https://blinklookup.com/dryer/lg/dryer/error-code-te2/The thermistor at the air inlet, or on the steam generator where the machine has one, is out of order. On steam models cold air drawn back through the exhaust can pull that reading down faster than it should, so the vent is still the first check.Sat, 26 Sep 2026 00:00:00 GMTDryerLGhighhttps://blinklookup.com/dryer/samsung/dryer/status-dn/https://blinklookup.com/dryer/samsung/dryer/status-dn/Not a fault. The machine is updating itself and has to stay connected to power until the download finishes. If it is still showing well past the time the manufacturer quotes, that is worth a call rather than another power cycle.Sat, 26 Sep 2026 00:00:00 GMTDryerSamsungnot-a-faulthttps://blinklookup.com/dryer/samsung/dryer/error-code-3e/https://blinklookup.com/dryer/samsung/dryer/error-code-3e/The control could not confirm that the motor was turning. On these dryers the drum motor is an inverter unit, so the motor, its position sensors, and the drive module are checked as one assembly rather than separately.Sat, 26 Sep 2026 00:00:00 GMTDryerSamsunghighhttps://blinklookup.com/dryer/samsung/dryer/error-code-5c/https://blinklookup.com/dryer/samsung/dryer/error-code-5c/Models with a water tank need to empty the used water after a cycle, and this code reports that the tank or the drain hose is not clearing. If the hose is frozen, warm damp towels on the hose thaw it without any tools at all.Sat, 26 Sep 2026 00:00:00 GMTDryerSamsunghighhttps://blinklookup.com/dryer/samsung/dryer/error-code-9c1/https://blinklookup.com/dryer/samsung/dryer/error-code-9c1/The control saw incoming power outside the range it can work with. A stacked pair can also show this if the washer is asked to control the dryer within a few seconds of the washer being switched on, and a software update clears that particular case.Sat, 26 Sep 2026 00:00:00 GMTDryerSamsungmoderatehttps://blinklookup.com/dryer/samsung/dryer/error-code-ac/https://blinklookup.com/dryer/samsung/dryer/error-code-ac/The dryer internal components cannot talk to each other, and the control says so rather than guessing. A full minute with the power off is the documented first step, and a code that survives that needs the wiring and the board checked.Sat, 26 Sep 2026 00:00:00 GMTDryerSamsunghighhttps://blinklookup.com/dryer/samsung/dryer/error-code-be/https://blinklookup.com/dryer/samsung/dryer/error-code-be/A key on the panel reported held down longer than the control expects. With the machine off, press and release every button individually, working to the edges of each one, which frees a key that detergent and moisture have gummed up.Sat, 26 Sep 2026 00:00:00 GMTDryerSamsunglowhttps://blinklookup.com/dryer/samsung/dryer/error-code-c90/https://blinklookup.com/dryer/samsung/dryer/error-code-c90/The airflow test measured the exhaust as almost completely restricted, and this is the reading to act on immediately. Lint built up in a duct over years is combustible, and an electric dryer running against a blocked vent is exactly how that fire starts.Sat, 26 Sep 2026 00:00:00 GMTDryerSamsungmoderatehttps://blinklookup.com/dryer/samsung/dryer/error-code-de/https://blinklookup.com/dryer/samsung/dryer/error-code-de/The control ran its door check and the latch and the door switch did not agree. On a dryer this matters twice, because a turning drum with the door open is a hazard and a door that never releases traps laundry inside.Sat, 26 Sep 2026 00:00:00 GMTDryerSamsungmoderatehttps://blinklookup.com/dryer/samsung/dryer/error-code-fc/https://blinklookup.com/dryer/samsung/dryer/error-code-fc/The control measured the supply frequency or the supply itself as outside what it expects, which points at the installation rather than at a dryer part. Restarting the cycle clears it when the supply was simply interrupted.Sat, 26 Sep 2026 00:00:00 GMTDryerSamsungmoderatehttps://blinklookup.com/dryer/samsung/dryer/error-code-hc/https://blinklookup.com/dryer/samsung/dryer/error-code-hc/The machine measured air or drum temperature above its limit and shut the heat and the drum down. On an electric dryer that is almost always airflow, so the lint filter and the vent path come before any part gets ordered.Sat, 26 Sep 2026 00:00:00 GMTDryerSamsungcriticalhttps://blinklookup.com/dryer/samsung/dryer/error-code-hc2/https://blinklookup.com/dryer/samsung/dryer/error-code-hc2/The dryer asked for heat, opened the gas valve, and the burner did not establish a flame the flame sensor would accept. The gas shuts off and the machine stops, which is the correct behaviour on a gas appliance.Sat, 26 Sep 2026 00:00:00 GMTDryerSamsungcriticalhttps://blinklookup.com/dryer/samsung/dryer/error-code-nc/https://blinklookup.com/dryer/samsung/dryer/error-code-nc/The machine wants the filter checked. A dryer pushes a lot of air through a small screen, and a filter that has not been cleaned since the last few loads will slow the whole exhaust path without the drum ever appearing to be at fault.Sat, 26 Sep 2026 00:00:00 GMTDryerSamsungmoderatehttps://blinklookup.com/dryer/samsung/dryer/error-code-od/https://blinklookup.com/dryer/samsung/dryer/error-code-od/The machine ran a full cycle and the moisture sensing never saw the load reach its dryness target. The drum may be turning perfectly, so the load size, the spin that came before it, and the vent are the three things to look at.Sat, 26 Sep 2026 00:00:00 GMTDryerSamsunghighhttps://blinklookup.com/dryer/samsung/dryer/error-code-te/https://blinklookup.com/dryer/samsung/dryer/error-code-te/The air temperature thermistor has gone open or shorted, and on a dryer that reading is normally pushed out of range by a restricted vent. Clean the filter and clear the vent before deciding the sensor has failed.Sat, 26 Sep 2026 00:00:00 GMTDryerSamsunghighhttps://blinklookup.com/dishwasher/lg/dishwasher/status-2h/https://blinklookup.com/dishwasher/lg/dishwasher/status-2h/Not an error code. Two hours is the estimate of time left, and once it drops under about 99 minutes the display counts down to the end of the cycle. Nothing needs fixing.Sat, 26 Sep 2026 00:00:00 GMTDishwasherLGnot-a-faulthttps://blinklookup.com/dishwasher/lg/dishwasher/status-cl/https://blinklookup.com/dishwasher/lg/dishwasher/status-cl/Not a fault. The control lock stops the panel being changed by accident, which matters most in a home with children. It releases with the same hold that set it.Sat, 26 Sep 2026 00:00:00 GMTDishwasherLGnot-a-faulthttps://blinklookup.com/dishwasher/lg/dishwasher/error-code-ae/https://blinklookup.com/dishwasher/lg/dishwasher/error-code-ae/The flow switch in the base pan has tripped, and the machine drains continuously to keep water off the floor. Dishwashing liquid, more than one pod, and an unlevel machine all produce it, and all three are worth ruling out before a technician is called.Sat, 26 Sep 2026 00:00:00 GMTDishwasherLGhighhttps://blinklookup.com/dishwasher/lg/dishwasher/error-code-be/https://blinklookup.com/dishwasher/lg/dishwasher/error-code-be/Oversudsing raised the level enough that the machine stopped to protect itself. The machine exists to handle a measured dose of dishwasher detergent, and dishwashing liquid or two pods produce a foam blanket no overflow switch should be asked to absorb.Sat, 26 Sep 2026 00:00:00 GMTDishwasherLGlowhttps://blinklookup.com/dishwasher/lg/dishwasher/error-code-f31/https://blinklookup.com/dishwasher/lg/dishwasher/error-code-f31/The fan that moves moist air out of the tub during the drying stage is not running, so the machine stops rather than finish a cycle that would leave condensation behind the door. Water poured into that fan duct is a common way to cause it.Sat, 26 Sep 2026 00:00:00 GMTDishwasherLGhighhttps://blinklookup.com/dishwasher/lg/dishwasher/error-code-f35/https://blinklookup.com/dishwasher/lg/dishwasher/error-code-f35/The drying stage did not reach the temperature the control expected in the time allowed. The heater, the fan, and the thermistor in that circuit are the parts involved, and a heavily loaded rack makes the fault more likely.Sat, 26 Sep 2026 00:00:00 GMTDishwasherLGmoderatehttps://blinklookup.com/dishwasher/lg/dishwasher/error-code-f37/https://blinklookup.com/dishwasher/lg/dishwasher/error-code-f37/The feature that cracks the door at the end of a cycle to release steam and let the load dry is not moving the door. It sounds cosmetic, but it is the one job the mechanism exists to do, so dishes come out wetter without it.Sat, 26 Sep 2026 00:00:00 GMTDishwasherLGmoderatehttps://blinklookup.com/dishwasher/lg/dishwasher/error-code-he/https://blinklookup.com/dishwasher/lg/dishwasher/error-code-he/The machine could not get the water to the temperature the cycle needs, or the water went past a limit the control treats as a fault. The element, the circulation pump, and the thermistor are all on the list of parts that cause it.Sat, 26 Sep 2026 00:00:00 GMTDishwasherLGhighhttps://blinklookup.com/dishwasher/lg/dishwasher/error-code-ie/https://blinklookup.com/dishwasher/lg/dishwasher/error-code-ie/The water level did not get high enough within about ten minutes of filling. On a recently installed machine the supply valve not being fully open is the first thing to rule out, and after that the inlet hose and its filter.Sat, 26 Sep 2026 00:00:00 GMTDishwasherLGhighhttps://blinklookup.com/dishwasher/lg/dishwasher/error-code-le/https://blinklookup.com/dishwasher/lg/dishwasher/error-code-le/The motor that runs the cleaning cycle is not operating normally. It is not an owner-level repair, and the useful thing an owner can do is confirm the machine is level and that nothing is blocking the spray arms.Sat, 26 Sep 2026 00:00:00 GMTDishwasherLGhighhttps://blinklookup.com/dishwasher/lg/dishwasher/error-code-ne/https://blinklookup.com/dishwasher/lg/dishwasher/error-code-ne/The motor that moves the spray arms between heights has failed, and the machine will not wash with the arms stuck in one position. The result is one zone of the tub that comes out dirty while everything else looks fine.Sat, 26 Sep 2026 00:00:00 GMTDishwasherLGhighhttps://blinklookup.com/dishwasher/lg/dishwasher/error-code-oe/https://blinklookup.com/dishwasher/lg/dishwasher/error-code-oe/Water was not pumped out in the time allowed. Food residue in the filter, a kinked drain hose, and a disposal connection that was never cleared are the three causes that account for nearly all of them.Sat, 26 Sep 2026 00:00:00 GMTDishwasherLGhighhttps://blinklookup.com/dishwasher/lg/dishwasher/error-code-pe/https://blinklookup.com/dishwasher/lg/dishwasher/error-code-pe/The sensor that watches the level in the base pan to prevent leaks has stopped behaving. On older models in particular this is the code that comes with a machine that will not hold enough water to run a cycle.Sat, 26 Sep 2026 00:00:00 GMTDishwasherLGhighhttps://blinklookup.com/dishwasher/lg/dishwasher/error-code-pf/https://blinklookup.com/dishwasher/lg/dishwasher/error-code-pf/The supply to the machine was interrupted and the control logged it. A restart clears it, and a PF with no power event behind it is worth having the supply checked.Sat, 26 Sep 2026 00:00:00 GMTDishwasherLGmoderatehttps://blinklookup.com/dishwasher/lg/dishwasher/error-code-te/https://blinklookup.com/dishwasher/lg/dishwasher/error-code-te/The sensor in the water path has a contact problem or has failed, and there is no owner-level fix for it. The same fault is displayed as TE on some panels, where the letters are simply reversed, so a display reading TE means the thermistor and not a different part.Sat, 26 Sep 2026 00:00:00 GMTDishwasherLGhighhttps://blinklookup.com/dishwasher/samsung/dishwasher/status-ap/https://blinklookup.com/dishwasher/samsung/dishwasher/status-ap/Not a fault. The machine is in its own wireless setup mode waiting for a phone app to join it directly, and it will leave the mode on its own if the setup is not completed.Sat, 26 Sep 2026 00:00:00 GMTDishwasherSamsungnot-a-faulthttps://blinklookup.com/dishwasher/samsung/dishwasher/error-code-1e/https://blinklookup.com/dishwasher/samsung/dishwasher/error-code-1e/Water is not moving through the fine filter fast enough for the control, and it reports the filter rather than a spray problem. On WaterWall models the filter sits in the path of every wash, so a partial blockage shows up early.Sat, 26 Sep 2026 00:00:00 GMTDishwasherSamsungmoderatehttps://blinklookup.com/dishwasher/samsung/dishwasher/error-code-3c/https://blinklookup.com/dishwasher/samsung/dishwasher/error-code-3c/The control energised the drain pump and did not get the feedback it expects from it. A hum with no water moving usually means the impeller is jammed by glass or a nut, and silence usually means the circuit never reached the pump.Sat, 26 Sep 2026 00:00:00 GMTDishwasherSamsunghighhttps://blinklookup.com/dishwasher/samsung/dishwasher/error-code-3e/https://blinklookup.com/dishwasher/samsung/dishwasher/error-code-3e/Water arriving at the machine was above the temperature the control accepts. Dishwashers heat their own water, and incoming water that is already hot upsets the cycle and shortens the life of the plastics and seals.Sat, 26 Sep 2026 00:00:00 GMTDishwasherSamsungmoderatehttps://blinklookup.com/dishwasher/samsung/dishwasher/error-code-4c/https://blinklookup.com/dishwasher/samsung/dishwasher/error-code-4c/The machine tried to fill and never reached the level it needs to start a wash. On this appliance that is a supply-side problem far more often than a fault inside the machine.Sat, 26 Sep 2026 00:00:00 GMTDishwasherSamsunghighhttps://blinklookup.com/dishwasher/samsung/dishwasher/error-code-5c/https://blinklookup.com/dishwasher/samsung/dishwasher/error-code-5c/The drain pump ran and the control could not confirm the sump had emptied, so the cycle stopped. Start with the fine filter, then the air gap at the standpipe, and check whether the disposal knockout plug was ever removed.Sat, 26 Sep 2026 00:00:00 GMTDishwasherSamsunghighhttps://blinklookup.com/dishwasher/samsung/dishwasher/error-code-7e/https://blinklookup.com/dishwasher/samsung/dishwasher/error-code-7e/This model steers water with a reflector panel instead of relying only on a spray arm, and the control checks that the reflector is seated and free to move. Blockages and leftover packing tape are the usual finds.Sat, 26 Sep 2026 00:00:00 GMTDishwasherSamsungmoderatehttps://blinklookup.com/dishwasher/samsung/dishwasher/error-code-9c/https://blinklookup.com/dishwasher/samsung/dishwasher/error-code-9c/The level sensor never confirmed the fill the programme needs, so the wash was not allowed to begin. A closed tap, a kinked inlet hose, or a partly blocked inlet screen produces this on an otherwise healthy machine.Sat, 26 Sep 2026 00:00:00 GMTDishwasherSamsunghighhttps://blinklookup.com/dishwasher/samsung/dishwasher/error-code-be/https://blinklookup.com/dishwasher/samsung/dishwasher/error-code-be/A key on the panel reported held down for longer than the control expects. Work the buttons back and forth to the edges of each one with the machine off, which releases detergent and moisture that has crept into the seam.Sat, 26 Sep 2026 00:00:00 GMTDishwasherSamsunglowhttps://blinklookup.com/dishwasher/samsung/dishwasher/error-code-ce/https://blinklookup.com/dishwasher/samsung/dishwasher/error-code-ce/The panel and the board behind it are not exchanging messages, so nothing the buttons ask for actually happens. A power cycle clears it often enough to be worth trying, and a fault that survives that needs the door harness and the board checked.Sat, 26 Sep 2026 00:00:00 GMTDishwasherSamsunghighhttps://blinklookup.com/dishwasher/samsung/dishwasher/error-code-hc/https://blinklookup.com/dishwasher/samsung/dishwasher/error-code-hc/The control saw a temperature or a moisture condition it did not expect and shut down. A blocked water reflector, a leak into the base, or a siphoning drain hose all produce the same code, so the base and the hose are the first two things to look at.Sat, 26 Sep 2026 00:00:00 GMTDishwasherSamsunghighhttps://blinklookup.com/dishwasher/samsung/dishwasher/error-code-lc/https://blinklookup.com/dishwasher/samsung/dishwasher/error-code-lc/The base pan sensor found water where the machine should be dry, and the control stopped to keep the electronics out of trouble. The base often holds only a small amount, so the visible puddle under the cabinet can be much smaller than the fault feels like.Sat, 26 Sep 2026 00:00:00 GMTDishwasherSamsunghighhttps://blinklookup.com/dishwasher/samsung/dishwasher/error-code-oc/https://blinklookup.com/dishwasher/samsung/dishwasher/error-code-oc/The control read a level above what the tub should hold and diverted water out. In a dishwasher this almost always means a drain that is not clearing rather than a fill valve stuck open.Sat, 26 Sep 2026 00:00:00 GMTDishwasherSamsunghighhttps://blinklookup.com/dishwasher/samsung/dishwasher/error-code-pc/https://blinklookup.com/dishwasher/samsung/dishwasher/error-code-pc/The intensive zone option could not be delivered, so the control cancelled the cycle that depends on it. The same programme normally runs fine with the option switched off, which tells you the machine itself is healthy.Sat, 26 Sep 2026 00:00:00 GMTDishwasherSamsunglowhttps://blinklookup.com/dishwasher/samsung/dishwasher/error-code-pe/https://blinklookup.com/dishwasher/samsung/dishwasher/error-code-pe/The half-load option could not be set up on this cycle, so the control cancelled rather than run a programme it could not satisfy. Check the upper spray feed for blockage and confirm the option is permitted on that programme for your model.Sat, 26 Sep 2026 00:00:00 GMTDishwasherSamsunglowhttps://blinklookup.com/dishwasher/bosch/dw/error-code-e01/https://blinklookup.com/dishwasher/bosch/dw/error-code-e01/The circuit that drives the heat pump motor has failed at the main control board. The breaker reset is the documented first step, and a returning code points at the board or the motor rather than at anything the owner can service.Sat, 26 Sep 2026 00:00:00 GMTDishwasherBoschhighhttps://blinklookup.com/dishwasher/bosch/dw/error-code-e02/https://blinklookup.com/dishwasher/bosch/dw/error-code-e02/A relay on the main board has failed or is being commanded in a way the board does not recognise. Board level faults are not owner-repairable, and the breaker reset clears the state without correcting the underlying relay.Sat, 26 Sep 2026 00:00:00 GMTDishwasherBoschhighhttps://blinklookup.com/dishwasher/bosch/dw/error-code-e04/https://blinklookup.com/dishwasher/bosch/dw/error-code-e04/The machine tested its own heater electronics at startup and found a fault, which is a self diagnosis rather than a symptom. The self test result is why the code appears before any water has moved.Sat, 26 Sep 2026 00:00:00 GMTDishwasherBoschhighhttps://blinklookup.com/dishwasher/bosch/dw/error-code-e05/https://blinklookup.com/dishwasher/bosch/dw/error-code-e05/The mechanism that directs water to different spray arms is not being commanded correctly by the main board. One zone of the tub comes out dirty while the rest looks fine, which is the symptom worth recognising on a machine with this code.Sat, 26 Sep 2026 00:00:00 GMTDishwasherBoschhighhttps://blinklookup.com/dishwasher/bosch/dw/error-code-e06/https://blinklookup.com/dishwasher/bosch/dw/error-code-e06/The control cannot confirm the door state, so it will not start a cycle with a door it cannot verify. A door that has dropped slightly out of square produces this repeatedly, and the sensor itself is checked before the board is blamed.Sat, 26 Sep 2026 00:00:00 GMTDishwasherBoschmoderatehttps://blinklookup.com/dishwasher/bosch/dw/error-code-e07/https://blinklookup.com/dishwasher/bosch/dw/error-code-e07/The fan in the Zeolite drying chamber has failed, and on a machine that uses that chamber for drying it is a real loss of function rather than a cosmetic fault. Only models with a Crystal Dry or Zeolite chamber report this code at all.Sat, 26 Sep 2026 00:00:00 GMTDishwasherBoschhighhttps://blinklookup.com/dishwasher/bosch/dw/error-code-e10/https://blinklookup.com/dishwasher/bosch/dw/error-code-e10/The heater in the Zeolite drying chamber is not operating, so the chamber cannot regenerate the drying capability the cycle depends on. It appears only on machines with that chamber, and it is a different heater from the one that heats the wash water.Sat, 26 Sep 2026 00:00:00 GMTDishwasherBoschhighhttps://blinklookup.com/dishwasher/bosch/dw/error-code-e12/https://blinklookup.com/dishwasher/bosch/dw/error-code-e12/Scale has built up in the heat pump chamber until the machine will not heat properly, and it is the one Bosch fault with a clear owner-level answer. Descaling with the product made for the machine restores the heating, and in hard water areas it is a routine job rather than a repair.Sat, 26 Sep 2026 00:00:00 GMTDishwasherBoschmoderatehttps://blinklookup.com/dishwasher/bosch/dw/error-code-e14/https://blinklookup.com/dishwasher/bosch/dw/error-code-e14/The flow meter that measures water going into the tub has failed, or the filling system has a fault the machine cannot distinguish from a failed meter. It is not an owner-level repair, but confirming the supply valve is fully open rules out the cheaper cause first.Sat, 26 Sep 2026 00:00:00 GMTDishwasherBoschhighhttps://blinklookup.com/dishwasher/bosch/dw/error-code-e15/https://blinklookup.com/dishwasher/bosch/dw/error-code-e15/The safety switch under the tub has found water where it should be dry and has shut the machine down so it cannot pump a leak onto a floor. This is the one dishwasher code worth reacting to immediately, and the water supply should be closed before anything else is looked at.Sat, 26 Sep 2026 00:00:00 GMTDishwasherBoschcriticalhttps://blinklookup.com/dishwasher/bosch/dw/error-code-e16/https://blinklookup.com/dishwasher/bosch/dw/error-code-e16/The inlet path is not delivering water. An inlet hose that is kinked, crushed against a cabinet rail, or frozen is the first thing to look at, and a closed or partly closed supply valve is the second.Sat, 26 Sep 2026 00:00:00 GMTDishwasherBoschhighhttps://blinklookup.com/dishwasher/bosch/dw/error-code-e18/https://blinklookup.com/dishwasher/bosch/dw/error-code-e18/The machine did not get the water volume it needed within the fill time, which points at the supply rather than at the machine. Bosch specifies about ten litres a minute through the tap, so a partly closed supply valve or a hose kinked behind the cabinet explains most of these.Sat, 26 Sep 2026 00:00:00 GMTDishwasherBoschhighhttps://blinklookup.com/dishwasher/bosch/dw/error-code-e19/https://blinklookup.com/dishwasher/bosch/dw/error-code-e19/The circuit that opens the detergent compartment at the right moment in the cycle has failed, which means detergent is released late or not at all. Dishes come out clean but with a gritty or chemical film that a second rinse does not fix.Sat, 26 Sep 2026 00:00:00 GMTDishwasherBoschmoderatehttps://blinklookup.com/dishwasher/bosch/dw/error-code-e20/https://blinklookup.com/dishwasher/bosch/dw/error-code-e20/The heater inside the heat pump chamber is not operating. Bosch describes a breaker reset for thirty seconds as the first step, and a code that returns after that is a genuine heater fault rather than a control that lost its state.Sat, 26 Sep 2026 00:00:00 GMTDishwasherBoschhighhttps://blinklookup.com/dishwasher/bosch/dw/error-code-e21/https://blinklookup.com/dishwasher/bosch/dw/error-code-e21/The heat pump cannot move air, which on this brand is almost always scale in the chamber rather than a failed motor. Descaling is the first step, and the pump is only replaced when descaling does not clear it.Sat, 26 Sep 2026 00:00:00 GMTDishwasherBoschhighhttps://blinklookup.com/dishwasher/bosch/dw/error-code-e22/https://blinklookup.com/dishwasher/bosch/dw/error-code-e22/The filter in the floor of the tub is packed enough that the control can no longer see the water moving. Bosch treats this as a serviceable fault rather than a nuisance because the same restriction quietly starves the pump and the spray arms over time.Sat, 26 Sep 2026 00:00:00 GMTDishwasherBoschmoderatehttps://blinklookup.com/dishwasher/bosch/dw/error-code-e23/https://blinklookup.com/dishwasher/bosch/dw/error-code-e23/The drain pump is not moving water, and Bosch lists all three possibilities in one line because the symptom is the same. A blocked filter and debris in the pump housing are checked before the pump itself is condemned.Sat, 26 Sep 2026 00:00:00 GMTDishwasherBoschhighhttps://blinklookup.com/dishwasher/bosch/dw/error-code-e24/https://blinklookup.com/dishwasher/bosch/dw/error-code-e24/The machine could not empty the tub, and the usual causes are a blocked filter, standing water in the drain pump housing, a pump cover that is not latched, or a drain hose that is kinked past the point where it can flow. It is the most common fault on this brand and the most often resolved without parts.Sat, 26 Sep 2026 00:00:00 GMTDishwasherBoschhighhttps://blinklookup.com/dishwasher/bosch/dw/error-code-e27/https://blinklookup.com/dishwasher/bosch/dw/error-code-e27/The supply voltage at the machine is below what the control will run on, so it shuts down rather than work erratically. Bosch documents the breaker reset as the first step and an electrician as the answer if it returns, which is the right order to work in.Sat, 26 Sep 2026 00:00:00 GMTDishwasherBoschmoderatehttps://blinklookup.com/refrigerator/lg/fridge/status-cl/https://blinklookup.com/refrigerator/lg/fridge/status-cl/Not a fault. The panel is locked so a child cannot change settings or start a defrost. It releases with the same hold that set it.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorLGnot-a-faulthttps://blinklookup.com/refrigerator/lg/fridge/status-of-f/https://blinklookup.com/refrigerator/lg/fridge/status-of-f/Not a fault. Demo or display mode switches off all cooling so a cabinet can be left running in a shop, and it is why a powered-up cabinet can show temperatures while nothing is cold. Hold the refrigerator and ice plus buttons together to exit it.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorLGnot-a-faulthttps://blinklookup.com/refrigerator/lg/fridge/error-code-cf/https://blinklookup.com/refrigerator/lg/fridge/error-code-cf/The fan that draws air across the condenser coil has failed, which on this brand often shows as warm cabinet sides and a compressor that never stops. The coil and the space behind the cabinet are worth clearing before the fan is blamed.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorLGhighhttps://blinklookup.com/refrigerator/lg/fridge/error-code-co/https://blinklookup.com/refrigerator/lg/fridge/error-code-co/The board behind the cabinet and the panel you are reading are not exchanging messages, so nothing the panel shows is reliable. There is no reset for this one, and the door harness and the board both need checking.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorLGhighhttps://blinklookup.com/refrigerator/lg/fridge/error-code-dh/https://blinklookup.com/refrigerator/lg/fridge/error-code-dh/The control spent more than an hour trying to defrost and the evaporator never reached its defrost temperature, so it gave up. A blocked drain hole with ice in it is the single most common reason, and the code appears hours after you last opened the door.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorLGhighhttps://blinklookup.com/refrigerator/lg/fridge/error-code-ds/https://blinklookup.com/refrigerator/lg/fridge/error-code-ds/The sensor that watches the evaporator has a short or a disconnection in its circuit. There is no owner-level fix, and the letter before it tells you whether the freezer or the fresh food side is affected.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorLGhighhttps://blinklookup.com/refrigerator/lg/fridge/error-code-eid/https://blinklookup.com/refrigerator/lg/fridge/error-code-eid/The sensor the freezer ice maker uses to detect its own state has failed, so the control stops the ice maker rather than let it jam. There is no owner-level fix and the module is checked as a unit.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorLGhighhttps://blinklookup.com/refrigerator/lg/fridge/error-code-ff/https://blinklookup.com/refrigerator/lg/fridge/error-code-ff/The fan that moves air through the freezer section is not running normally, and frost around the blade is a common cause rather than a failed motor. Without that air the freezer warms even though the compressor keeps running.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorLGhighhttps://blinklookup.com/refrigerator/lg/fridge/error-code-fs/https://blinklookup.com/refrigerator/lg/fridge/error-code-fs/The freezer compartment thermistor has gone short or open, so the control no longer knows what temperature the freezer is holding. A sensor of this kind is a component rather than an adjustment, and the wiring at its connector is checked first.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorLGhighhttps://blinklookup.com/refrigerator/lg/fridge/error-code-hs/https://blinklookup.com/refrigerator/lg/fridge/error-code-hs/The humidity sensor circuit has a short or a disconnection, which stops the cabinet adjusting itself to the conditions in the room. It is a wiring or sensor fault rather than something that a factory reset resolves.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorLGhighhttps://blinklookup.com/refrigerator/lg/fridge/error-code-if/https://blinklookup.com/refrigerator/lg/fridge/error-code-if/The fan inside the ice maker is not running, and frost or ice around it is the usual cause. The whole ice circuit stops when it does, because the ice maker cannot cool its own area without moving that air.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorLGhighhttps://blinklookup.com/refrigerator/lg/fridge/error-code-it/https://blinklookup.com/refrigerator/lg/fridge/error-code-it/The ice maker reported an internal defect, which usually means a motor, a sensor, or the module itself rather than a blockage. Leaving it running lets the motor push against a stop, which is how a working module is destroyed.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorLGhighhttps://blinklookup.com/refrigerator/lg/fridge/error-code-rf/https://blinklookup.com/refrigerator/lg/fridge/error-code-rf/The fan serving the fresh food compartment is not operating normally, and frost on the blade is the usual explanation. The compartment can still feel cold from the cabinet walls, so the symptom is one warm side rather than no cooling at all.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorLGhighhttps://blinklookup.com/refrigerator/lg/fridge/error-code-rs/https://blinklookup.com/refrigerator/lg/fridge/error-code-rs/The fresh food compartment thermistor has gone short or open. It is the same part type as the freezer sensor in a different position, which is why the two codes are worth reading as a pair rather than separately.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorLGhighhttps://blinklookup.com/refrigerator/samsung/fridge/status-ap/https://blinklookup.com/refrigerator/samsung/fridge/status-ap/Not a fault. The cabinet is in its own wireless setup mode so a phone app can join it directly, and it leaves the mode on its own if the setup is not finished.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorSamsungnot-a-faulthttps://blinklookup.com/refrigerator/samsung/fridge/status-of-of/https://blinklookup.com/refrigerator/samsung/fridge/status-of-of/Not a fault. The cabinet is in its showroom or demonstration mode, which holds the temperature display at a fixed value and stops the compressor running. It is one of the most frequently misdiagnosed situations on a display refrigerator.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorSamsungnot-a-faulthttps://blinklookup.com/refrigerator/samsung/fridge/error-code-5e/https://blinklookup.com/refrigerator/samsung/fridge/error-code-5e/The sensor that watches the evaporator coil has gone open, shorted, or is reporting a value the control will not accept. The pattern to look for is heavy frost on the freezer walls that never clears, because that is a defrost that is not running.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorSamsunghighhttps://blinklookup.com/refrigerator/samsung/fridge/error-code-8e/https://blinklookup.com/refrigerator/samsung/fridge/error-code-8e/The ice maker detects its position and its harvest by sensors rather than by a timer, and this code means the control cannot trust where the ice is. A sensor fault here produces a machine that makes nothing, or that overfills the bucket.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorSamsunghighhttps://blinklookup.com/refrigerator/samsung/fridge/error-code-21e/https://blinklookup.com/refrigerator/samsung/fridge/error-code-21e/The fan that pushes cold air through the freezer section has failed or iced up. Without that airflow the freezer warms even though the compressor is running, which is why the fault often shows as rising freezer temperature rather than as a total failure.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorSamsunghighhttps://blinklookup.com/refrigerator/samsung/fridge/error-code-22e/https://blinklookup.com/refrigerator/samsung/fridge/error-code-22e/The fan that circulates air through the fresh food compartment has failed. The compartment can still feel cold from the cabinet walls alone, so the usual symptom is one warm side rather than a refrigerator that does not cool at all.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorSamsunghighhttps://blinklookup.com/refrigerator/samsung/fridge/error-code-23e/https://blinklookup.com/refrigerator/samsung/fridge/error-code-23e/The fan that draws air across the condenser coil has stalled or failed. On a static condenser refrigerator that fan moves all the cooling air, so a stopped fan means the compressor runs constantly without moving enough heat to keep the cabinet cold.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorSamsunghighhttps://blinklookup.com/refrigerator/samsung/fridge/error-code-33e/https://blinklookup.com/refrigerator/samsung/fridge/error-code-33e/The heater that releases frozen water from the ice pipe is not reporting correctly, so the pipe stays blocked and the ice maker cannot harvest. On many models the heater is bonded into a sealed block, which is not a part you separate or pry.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorSamsunghighhttps://blinklookup.com/refrigerator/samsung/fridge/error-code-39e/https://blinklookup.com/refrigerator/samsung/fridge/error-code-39e/The ice maker could not complete one of its steps, usually a harvest that did not finish or an arm that did not return. Leaving it jammed lets the motor push against a stop, which is how the module itself gets destroyed.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorSamsunghighhttps://blinklookup.com/refrigerator/samsung/fridge/error-code-40e/https://blinklookup.com/refrigerator/samsung/fridge/error-code-40e/The small fan in the ice storage area has failed, and that compartment needs forced air to keep the ice from clumping. The first sign is ice going soft in the bucket while the freezer itself is still cold.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorSamsunghighhttps://blinklookup.com/refrigerator/samsung/fridge/error-code-41c/https://blinklookup.com/refrigerator/samsung/fridge/error-code-41c/A display model has flagged that its software is out of date or that an update was interrupted. It is a housekeeping message rather than a mechanical fault, and it usually clears once the software is brought up to date through the app.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorSamsunglowhttps://blinklookup.com/refrigerator/samsung/fridge/error-code-76c/https://blinklookup.com/refrigerator/samsung/fridge/error-code-76c/The dispenser that fills a container by itself has a sensor that measures the container and the water level, and it found water where it did not expect it. Drying the compartment out completely is usually all that is needed.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorSamsunglowhttps://blinklookup.com/refrigerator/samsung/fridge/error-code-84c/https://blinklookup.com/refrigerator/samsung/fridge/error-code-84c/The compressor failed to start, or started and tripped, and the control has locked it out to protect the sealed system. A locked compressor is the end of the line for that component, and a technician needs to pressure test the system before anything is replaced.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorSamsungcriticalhttps://blinklookup.com/refrigerator/samsung/fridge/error-code-85c/https://blinklookup.com/refrigerator/samsung/fridge/error-code-85c/The control saw incoming voltage drop low enough to show a message. On most display refrigerators this is a short power event rather than an ongoing fault, and it clears on its own once power is stable.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorSamsunglowhttps://blinklookup.com/refrigerator/samsung/fridge/error-code-88-88/https://blinklookup.com/refrigerator/samsung/fridge/error-code-88-88/The control lost power and came back needing to reset its state, and this is what it shows while it does so. It is a record of an event rather than a failed part, so check whether the cabinet is running normally before treating it as a fault.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorSamsungmoderatehttps://blinklookup.com/refrigerator/samsung/fridge/error-code-pc-er/https://blinklookup.com/refrigerator/samsung/fridge/error-code-pc-er/The display panel and the board behind it are not exchanging messages, usually over the ribbon or wires running through the door hinge. Nothing the panel asks for will work until the link is back.Sat, 26 Sep 2026 00:00:00 GMTRefrigeratorSamsunghighhttps://blinklookup.com/furnace/goodman/gmv/1-flash/https://blinklookup.com/furnace/goodman/gmv/1-flash/The oldest way Goodman reports a failed ignition. The control opened the gas valve, waited for the burner to light three times, saw nothing, and then closed everything down and stopped trying. The gas valve is already shut by the time you read this code.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmancriticalhttps://blinklookup.com/furnace/goodman/gmv/2-flash/https://blinklookup.com/furnace/goodman/gmv/2-flash/Before the burner was called for, the pressure switch reported that the furnace was already venting. Either the switch is stuck, or the clear tube running to it is holding air when it should be open to the draft.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmv/3-flash/https://blinklookup.com/furnace/goodman/gmv/3-flash/The draft inducer spun up to pull air through the heat exchanger and the control never got confirmation that air was actually moving. Without that proof it will not release the gas. This is a safety interlock, not a nuisance alarm.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmancriticalhttps://blinklookup.com/furnace/goodman/gmv/4-flash/https://blinklookup.com/furnace/goodman/gmv/4-flash/Airflow through the furnace dropped below what the heat exchanger needs, so the high limit switch opened and the control shut the burners down. It is protecting the exchanger from being burned through, and it will keep doing so until airflow is restored.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmv/5-flash/https://blinklookup.com/furnace/goodman/gmv/5-flash/The control detected a flame when the gas valve was closed and no burner was supposed to be lit. It shuts down immediately. Either something is leaking fuel into the burner area, or the flame sensor is seeing light or heat from somewhere it should not.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmancriticalhttps://blinklookup.com/furnace/goodman/gmv/6-flash/https://blinklookup.com/furnace/goodman/gmv/6-flash/The rollout switch is a heat sensor mounted right above the burner. It opened because the burner area got hotter than the switch allows, which is a sign of flame or gas escaping past the heat exchanger. The control shuts down to keep those gases from moving through the house.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmancriticalhttps://blinklookup.com/furnace/goodman/gmv/7-flash/https://blinklookup.com/furnace/goodman/gmv/7-flash/The burner lit, but the flame sensor was not reading a steady flame. The control saw the flame flicker, drop out, or come on too weakly, and shut down rather than run with an unstable flame. An unstable flame is an incomplete burn, and incomplete burn is how carbon monoxide gets made.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmv/8-flash/https://blinklookup.com/furnace/goodman/gmv/8-flash/The control energised the igniter and then watched for the flame it should have produced. Either the igniter is not drawing current, it is drawing but not getting hot enough to light, or current is leaking to ground somewhere it should not be. A damaged or loose ground on the burner box produces this code on some of these controls.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmv/9-flash/https://blinklookup.com/furnace/goodman/gmv/9-flash/On a two stage furnace the second stage of gas heat is not proving draft. The control started the inducer for high stage, never got pressure switch confirmation, and shut down. The furnace may still make heat on low stage, which is why this often shows up as weak heat rather than no heat.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmss9/1-flash/https://blinklookup.com/furnace/goodman/gmss9/1-flash/The control counted three failed ignition attempts and shut the burner down. It is the same lockout the older flash-count boards reported as one flash, carried over to a platform that counts attempts internally rather than announcing each one.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmancriticalhttps://blinklookup.com/furnace/goodman/gmss9/2-flash/https://blinklookup.com/furnace/goodman/gmss9/2-flash/Before the burner was called for, the pressure switch reported that the furnace was already venting. Either the switch is stuck, or the clear tube running to it is holding air when it should be open to the draft.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmss9/3-flash/https://blinklookup.com/furnace/goodman/gmss9/3-flash/The draft inducer spun up to pull air through the heat exchanger and the control never got confirmation that air was actually moving. Without that proof it will not release the gas. This is a safety interlock, not a nuisance alarm.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmancriticalhttps://blinklookup.com/furnace/goodman/gmss9/4-flash/https://blinklookup.com/furnace/goodman/gmss9/4-flash/Airflow through the furnace dropped below what the heat exchanger needs, so the high limit switch opened and the control shut the burners down. It is protecting the exchanger from being burned through, and it will keep doing so until airflow is restored.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmss9/5-flash/https://blinklookup.com/furnace/goodman/gmss9/5-flash/The control detected a flame when the gas valve was closed and no burner was supposed to be lit. It shuts down immediately. Either something is leaking fuel into the burner area, or the flame sensor is seeing light or heat from somewhere it should not.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmancriticalhttps://blinklookup.com/furnace/goodman/gmss9/6-flash/https://blinklookup.com/furnace/goodman/gmss9/6-flash/Two different faults land on six flashes on this control. If the burner area has been running hot, it is the rollout limit switch opening. If the unit is completely dead, no blower and no display, it is the control module fuse. The distinction is easy to make and it decides the whole repair.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmancriticalhttps://blinklookup.com/furnace/goodman/gmss9/7-flash/https://blinklookup.com/furnace/goodman/gmss9/7-flash/The burner lit, but the flame sensor was not reading a steady flame. The control saw the flame flicker, drop out, or come on too weakly, and shut down rather than run with an unstable flame. An unstable flame is an incomplete burn, and incomplete burn is how carbon monoxide gets made.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmss9/8-flash/https://blinklookup.com/furnace/goodman/gmss9/8-flash/The control energised the igniter and then watched for the flame it should have produced. Either the igniter is not drawing current, it is drawing but not getting hot enough to light, or current is leaking to ground somewhere it should not be. A damaged or loose ground on the burner box produces this code on some of these controls.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-b0/https://blinklookup.com/furnace/goodman/gmvm96/error-code-b0/The control has commanded the blower and nothing happened. Either the motor gets no power, the capacitor is dead, the motor is seized, or a control board output has failed. On a gas furnace this usually shows up as no heat, because the furnace will not fire without airflow.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-b1/https://blinklookup.com/furnace/goodman/gmvm96/error-code-b1/The control board and the blower motor are talking over a dedicated communication wire, and the message is not valid. Either the wire has come loose or been damaged, the motor has failed, or the board has lost the ability to talk to it.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-b2/https://blinklookup.com/furnace/goodman/gmvm96/error-code-b2/The control has an idea of what blower it is supposed to be talking to, and the motor on the unit does not match. In practice this is a setup problem rather than a hardware failure. It shows up after a motor swap, a control board swap, or an install mistake.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-b3/https://blinklookup.com/furnace/goodman/gmvm96/error-code-b3/The blower is running and the control has it in a protection state: too hot, too fast for the current demand, or outside the speed it should be using. This is the control limiting the motor rather than letting it run into something that would damage it.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-b4/https://blinklookup.com/furnace/goodman/gmvm96/error-code-b4/The motor is drawing more current than the control allows, so the circuit has tripped. Often a seized motor, a failed capacitor, or a blower wheel that has bound against the cabinet. A motor that has been running and is now tripping was usually already going.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-b5/https://blinklookup.com/furnace/goodman/gmvm96/error-code-b5/The control tried to start the motor and it seized on the spot. Current surged past the trip point and the circuit locked out. This is a hard motor failure, not something that will clear itself.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-b6/https://blinklookup.com/furnace/goodman/gmvm96/error-code-b6/The blower is tripping on overcurrent or on motor temperature, not on a simple start failure. That pattern usually points at a motor that is mechanically loaded, a supply problem, or a motor whose internal protection has started cutting out.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-b7/https://blinklookup.com/furnace/goodman/gmvm96/error-code-b7/The blower motor expects a set of instructions from the control before it runs, and did not receive a complete set. This is a control-side communication problem, usually appearing after a control board or motor change.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-b9/https://blinklookup.com/furnace/goodman/gmvm96/error-code-b9/The control has measured or estimated that the air coming back to the furnace is below what the system needs. Under-airflow makes the heat exchanger run hot, and the burner will not stay lit long enough to heat the house. On a heat pump it caps output entirely.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-d0/https://blinklookup.com/furnace/goodman/gmvm96/error-code-d0/The control is waiting to join a network of communicating equipment and has not completed it. This is informational more than a fault. It usually shows on a new install, or after the furnace has been powered down long enough to lose its settings.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanmoderatehttps://blinklookup.com/furnace/goodman/gmvm96/error-code-d4/https://blinklookup.com/furnace/goodman/gmvm96/error-code-d4/The board found data on the memory card that it does not recognise or cannot use. Usually the wrong card, a card from a different model, or data that was interrupted while being written. The furnace falls back to a default configuration, which may not match the installed equipment.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-e0/https://blinklookup.com/furnace/goodman/gmvm96/error-code-e0/The letter code for a lockout on this platform, sitting in the same place the old boards put a single flash. The control tried to light the burner, hit its retry limit, and shut the gas valve. Nothing about the retry count changed; only how the control spells it.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmancriticalhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-e1/https://blinklookup.com/furnace/goodman/gmvm96/error-code-e1/This is the low stage pressure switch reporting venting before ignition. The switch should be closed until the draft is proven and then open as the inducer moves air. Reading venting at the moment the control expects the flue to still be full means the switch or its tube is not behaving, and the burner will not be called for.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-e2/https://blinklookup.com/furnace/goodman/gmvm96/error-code-e2/The letter code for a draft that never proved. The control started the inducer, waited for the pressure switch to confirm air is moving through the heat exchanger, got nothing, and kept the gas valve shut. Anything that stops the inducer moving air, or stops the switch seeing that it did, produces this code.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmancriticalhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-e3/https://blinklookup.com/furnace/goodman/gmvm96/error-code-e3/The high limit switch opened on this platform, which means the control measured airflow low enough that it decided the burners were too dangerous to run. The letter code tells you the same thing four flashes used to tell the older boards, with the added benefit that a low airflow fault on this control is usually reported before the limit switch has to act at all.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-e4/https://blinklookup.com/furnace/goodman/gmvm96/error-code-e4/The control found a flame it did not ask for. On this platform that means either fuel is getting into the burner area with the valve shut, or the flame sensor is picking up light or heat from somewhere else in the cabinet. Both readings are treated as unsafe, so the burners are shut immediately.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmancriticalhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-e5/https://blinklookup.com/furnace/goodman/gmvm96/error-code-e5/The control runs on a low voltage 24 volt circuit, protected by a small fuse on the board or harness. That fuse has blown, which means either an overload on the 24 volt side or a failed component. The board cannot do anything at all until this is sorted.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-e6/https://blinklookup.com/furnace/goodman/gmvm96/error-code-e6/The burner was running and the flame signal was not steady enough to trust. The control shut the burners down instead of running on a flame it could not read reliably. A sensor that is dirty, corroded, or mounted the wrong distance from the flame is the usual reason the signal wanders.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-e7/https://blinklookup.com/furnace/goodman/gmvm96/error-code-e7/The igniter circuit failed on this platform, either because the igniter itself is open or cracked, or because current is finding a path to ground it should not. A burner box painted over, corroded, or packed with dirt is enough to cause it, and the fix is cleaning metal and tightening a screw rather than buying a part.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-e8/https://blinklookup.com/furnace/goodman/gmvm96/error-code-e8/The same venting-before-ignition fault as the low stage version, reported on the high stage circuit. The high stage is what carries most of the airflow and the gas on a two stage furnace, so a fault here often shows up as a furnace that heats weakly rather than one that stops completely.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-e9/https://blinklookup.com/furnace/goodman/gmvm96/error-code-e9/The high stage draft did not prove on this platform. The control asked the inducer to move air for the second stage of gas heat, waited for the pressure switch to confirm it, and got nothing, so it closed the high stage gas valve. Low stage often keeps working, which is why this reads as weak or slow heat instead of a dead furnace.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-ea/https://blinklookup.com/furnace/goodman/gmvm96/error-code-ea/The 120 volt supply feeding the furnace is wired backwards. Most equipment will technically still run, but the electronics are not designed for it, and it is a genuine fire hazard at the connections. Some controls lock out rather than run at all.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-ec/https://blinklookup.com/furnace/goodman/gmvm96/error-code-ec/The draft inducer motor is drawing more current than the control expects and the motor circuit has tripped. Either the motor itself is loaded up, the wheel is jammed or fouled, or the capacitor is failing and the motor is running roughly.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-ed/https://blinklookup.com/furnace/goodman/gmvm96/error-code-ed/The rollout switch on this platform opened, meaning the area above the burner got hotter than the switch is set to allow. That usually points at combustion gases getting past the heat exchanger, so the control shuts the burners down rather than let them run. On a platform that uses letters instead of flashes, this is the letter to look for after the burner lights and then stops.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmancriticalhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-ef/https://blinklookup.com/furnace/goodman/gmvm96/error-code-ef/A control input expects a signal from something the furnace is working alongside, such as a heat pump, a humidifier or a zoning panel, and that input is reading open. The furnace itself may run fine, which is why this often gets ignored until a heat pump stops producing heat.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanlowhttps://blinklookup.com/furnace/goodman/gmvm96/error-code-if/https://blinklookup.com/furnace/goodman/gmvm96/error-code-if/The control has detected a fault in itself. Once a board decides it has failed internally, it stops and reports rather than guessing. On these controls the code is generic, which means the board is the usual answer rather than a component downstream.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-b0/https://blinklookup.com/furnace/goodman/gmvc95/error-code-b0/The control has commanded the blower and nothing happened. Either the motor gets no power, the capacitor is dead, the motor is seized, or a control board output has failed. On a gas furnace this usually shows up as no heat, because the furnace will not fire without airflow.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-b1/https://blinklookup.com/furnace/goodman/gmvc95/error-code-b1/The control board and the blower motor are talking over a dedicated communication wire, and the message is not valid. Either the wire has come loose or been damaged, the motor has failed, or the board has lost the ability to talk to it.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-b2/https://blinklookup.com/furnace/goodman/gmvc95/error-code-b2/The control has an idea of what blower it is supposed to be talking to, and the motor on the unit does not match. In practice this is a setup problem rather than a hardware failure. It shows up after a motor swap, a control board swap, or an install mistake.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-b3/https://blinklookup.com/furnace/goodman/gmvc95/error-code-b3/The blower is running and the control has it in a protection state: too hot, too fast for the current demand, or outside the speed it should be using. This is the control limiting the motor rather than letting it run into something that would damage it.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-b4/https://blinklookup.com/furnace/goodman/gmvc95/error-code-b4/The motor is drawing more current than the control allows, so the circuit has tripped. Often a seized motor, a failed capacitor, or a blower wheel that has bound against the cabinet. A motor that has been running and is now tripping was usually already going.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-b5/https://blinklookup.com/furnace/goodman/gmvc95/error-code-b5/The control tried to start the motor and it seized on the spot. Current surged past the trip point and the circuit locked out. This is a hard motor failure, not something that will clear itself.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-b6/https://blinklookup.com/furnace/goodman/gmvc95/error-code-b6/The blower is tripping on overcurrent or on motor temperature, not on a simple start failure. That pattern usually points at a motor that is mechanically loaded, a supply problem, or a motor whose internal protection has started cutting out.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-b7/https://blinklookup.com/furnace/goodman/gmvc95/error-code-b7/The blower motor expects a set of instructions from the control before it runs, and did not receive a complete set. This is a control-side communication problem, usually appearing after a control board or motor change.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-b9/https://blinklookup.com/furnace/goodman/gmvc95/error-code-b9/The control has measured or estimated that the air coming back to the furnace is below what the system needs. Under-airflow makes the heat exchanger run hot, and the burner will not stay lit long enough to heat the house. On a heat pump it caps output entirely.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-d0/https://blinklookup.com/furnace/goodman/gmvc95/error-code-d0/The control is waiting to join a network of communicating equipment and has not completed it. This is informational more than a fault. It usually shows on a new install, or after the furnace has been powered down long enough to lose its settings.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanmoderatehttps://blinklookup.com/furnace/goodman/gmvc95/error-code-d4/https://blinklookup.com/furnace/goodman/gmvc95/error-code-d4/The board found data on the memory card that it does not recognise or cannot use. Usually the wrong card, a card from a different model, or data that was interrupted while being written. The furnace falls back to a default configuration, which may not match the installed equipment.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-e0/https://blinklookup.com/furnace/goodman/gmvc95/error-code-e0/The letter code for a lockout on this platform, sitting in the same place the old boards put a single flash. The control tried to light the burner, hit its retry limit, and shut the gas valve. Nothing about the retry count changed; only how the control spells it.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmancriticalhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-e1/https://blinklookup.com/furnace/goodman/gmvc95/error-code-e1/This is the low stage pressure switch reporting venting before ignition. The switch should be closed until the draft is proven and then open as the inducer moves air. Reading venting at the moment the control expects the flue to still be full means the switch or its tube is not behaving, and the burner will not be called for.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-e2/https://blinklookup.com/furnace/goodman/gmvc95/error-code-e2/The letter code for a draft that never proved. The control started the inducer, waited for the pressure switch to confirm air is moving through the heat exchanger, got nothing, and kept the gas valve shut. Anything that stops the inducer moving air, or stops the switch seeing that it did, produces this code.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmancriticalhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-e3/https://blinklookup.com/furnace/goodman/gmvc95/error-code-e3/The high limit switch opened on this platform, which means the control measured airflow low enough that it decided the burners were too dangerous to run. The letter code tells you the same thing four flashes used to tell the older boards, with the added benefit that a low airflow fault on this control is usually reported before the limit switch has to act at all.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-e4/https://blinklookup.com/furnace/goodman/gmvc95/error-code-e4/The control found a flame it did not ask for. On this platform that means either fuel is getting into the burner area with the valve shut, or the flame sensor is picking up light or heat from somewhere else in the cabinet. Both readings are treated as unsafe, so the burners are shut immediately.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmancriticalhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-e5/https://blinklookup.com/furnace/goodman/gmvc95/error-code-e5/The control runs on a low voltage 24 volt circuit, protected by a small fuse on the board or harness. That fuse has blown, which means either an overload on the 24 volt side or a failed component. The board cannot do anything at all until this is sorted.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-e6/https://blinklookup.com/furnace/goodman/gmvc95/error-code-e6/The burner was running and the flame signal was not steady enough to trust. The control shut the burners down instead of running on a flame it could not read reliably. A sensor that is dirty, corroded, or mounted the wrong distance from the flame is the usual reason the signal wanders.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-e7/https://blinklookup.com/furnace/goodman/gmvc95/error-code-e7/The igniter circuit failed on this platform, either because the igniter itself is open or cracked, or because current is finding a path to ground it should not. A burner box painted over, corroded, or packed with dirt is enough to cause it, and the fix is cleaning metal and tightening a screw rather than buying a part.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-e8/https://blinklookup.com/furnace/goodman/gmvc95/error-code-e8/The same venting-before-ignition fault as the low stage version, reported on the high stage circuit. The high stage is what carries most of the airflow and the gas on a two stage furnace, so a fault here often shows up as a furnace that heats weakly rather than one that stops completely.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-e9/https://blinklookup.com/furnace/goodman/gmvc95/error-code-e9/The high stage draft did not prove on this platform. The control asked the inducer to move air for the second stage of gas heat, waited for the pressure switch to confirm it, and got nothing, so it closed the high stage gas valve. Low stage often keeps working, which is why this reads as weak or slow heat instead of a dead furnace.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-ea/https://blinklookup.com/furnace/goodman/gmvc95/error-code-ea/The 120 volt supply feeding the furnace is wired backwards. Most equipment will technically still run, but the electronics are not designed for it, and it is a genuine fire hazard at the connections. Some controls lock out rather than run at all.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gmvc95/error-code-if/https://blinklookup.com/furnace/goodman/gmvc95/error-code-if/The control has detected a fault in itself. Once a board decides it has failed internally, it stops and reports rather than guessing. On these controls the code is generic, which means the board is the usual answer rather than a component downstream.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gm9s96/status-dft/https://blinklookup.com/furnace/goodman/gm9s96/status-dft/A heat pump has entered its defrost cycle. The control reverses or stops the outdoor unit for a few minutes so melt water can drain off the outdoor coil instead of freezing on it. The outdoor fan stopping during a cold, humid morning is normal on this cycle and is not a fault.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmannot-a-faulthttps://blinklookup.com/furnace/goodman/gm9s96/status-f01/https://blinklookup.com/furnace/goodman/gm9s96/status-f01/F01 through F09 are the airflow selection values an installer picks from the setup menu during commissioning. They tell the control how much air the blower should move. They are configuration numbers, not errors, and a furnace displaying one of them is a furnace that has been set up.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmannot-a-faulthttps://blinklookup.com/furnace/goodman/gm9s96/status-fan/https://blinklookup.com/furnace/goodman/gm9s96/status-fan/The control has been told to run the blower, and the display is confirming that command. It appears on a normal call for heat or cool while the air is being moved. The blower running on its own with no call is worth a look, but the code itself is the board doing what it was asked.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmannot-a-faulthttps://blinklookup.com/furnace/goodman/gm9s96/status-gh/https://blinklookup.com/furnace/goodman/gm9s96/status-gh/The thermostat or an indoor unit is calling for gas heat, and the control is confirming the demand. This is the screen you see at the start of a normal heating cycle, before the draft blower proves the flue and the burners are called for. It is a demand being displayed, not a fault.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmannot-a-faulthttps://blinklookup.com/furnace/goodman/gm9s96/status-idl/https://blinklookup.com/furnace/goodman/gm9s96/status-idl/The board is powered up, sitting at the factory idle screen, and waiting for something to ask it to do a job. Nothing has failed. On this platform a letter followed by another letter reads like an error to most people, which is why this gets searched as a fault when it is simply what a healthy idle furnace looks like.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmannot-a-faulthttps://blinklookup.com/furnace/goodman/gm9s96/error-code-e1i/https://blinklookup.com/furnace/goodman/gm9s96/error-code-e1i/The board called for the burner, energised the igniter, and got no usable flame. Unlike a lockout, this code reports the ignition attempt itself failing rather than the end of a retry sequence. On this platform it is a direct read that the burner did not light.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmancriticalhttps://blinklookup.com/furnace/goodman/gm9s96/error-code-eaf/https://blinklookup.com/furnace/goodman/gm9s96/error-code-eaf/During a heat call the flame signal the control received was outside the range it considers valid. The burner was running, but the sensor was not reading a stable flame. The control shut the burners down rather than keep an unstable flame going, because an unstable flame burns incompletely.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmancriticalhttps://blinklookup.com/furnace/goodman/gm9s96/error-code-eal/https://blinklookup.com/furnace/goodman/gm9s96/error-code-eal/The lower airflow proving switch is not confirming that the blower is moving enough air. This is the same idea as a high limit fault, but detected before the burner is called for. It blocks heating rather than shutting it down, which is why it often shows up as a furnace that will not heat rather than one that trips.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gm9s96/error-code-ebl/https://blinklookup.com/furnace/goodman/gm9s96/error-code-ebl/The lower blower circuit has reported a fault. On this platform the code identifies which blower circuit, so the fault is on the lower motor and its wiring rather than in the gas train.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gm9s96/error-code-ebu/https://blinklookup.com/furnace/goodman/gm9s96/error-code-ebu/The upper blower circuit has reported a fault. The same as a lower circuit fault, but on the high speed side, which is the speed that usually carries the bulk of the airflow on a two stage system.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/gm9s96/error-code-ee0/https://blinklookup.com/furnace/goodman/gm9s96/error-code-ee0/This platform separates the two halves of a failed ignition. E1I is the attempt failing, and EE0 is what you are left with once the control has given up trying. A locked-out furnace here means the same thing as a lockout anywhere else: the gas valve is closed and the burner will not be called for again until the fault is cleared.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmancriticalhttps://blinklookup.com/furnace/goodman/apg13/1-flash/https://blinklookup.com/furnace/goodman/apg13/1-flash/The oldest way Goodman reports a failed ignition. The control opened the gas valve, waited for the burner to light three times, saw nothing, and then closed everything down and stopped trying. The gas valve is already shut by the time you read this code.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmancriticalhttps://blinklookup.com/furnace/goodman/apg13/2-flash/https://blinklookup.com/furnace/goodman/apg13/2-flash/A centrifugal switch on the outdoor unit is the speed switch that tells the control the fan has come up to speed. Two flashes means an end switch is open, which on this unit usually points at a fan motor problem, a failed switch itself, or a wiring issue between the two.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/apg13/3-flash/https://blinklookup.com/furnace/goodman/apg13/3-flash/The outdoor unit fan is sitting still, and the centrifugal switch is reporting a closed contact when the control expects it to be open. In practice this means the fan is not being commanded on, and the cause is usually in the outdoor controls or the wiring rather than the switch itself.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/apg13/4-flash/https://blinklookup.com/furnace/goodman/apg13/4-flash/Airflow through the furnace dropped below what the heat exchanger needs, so the high limit switch opened and the control shut the burners down. It is protecting the exchanger from being burned through, and it will keep doing so until airflow is restored.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/apg13/5-flash/https://blinklookup.com/furnace/goodman/apg13/5-flash/The control detected a flame when the gas valve was closed and no burner was supposed to be lit. It shuts down immediately. Either something is leaking fuel into the burner area, or the flame sensor is seeing light or heat from somewhere it should not.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmancriticalhttps://blinklookup.com/furnace/goodman/apg13/6-flash/https://blinklookup.com/furnace/goodman/apg13/6-flash/This is a short delay built into the unit, not a fault. After the thermostat stops calling for cooling, or after the anti-freeze timer releases a defrost, the unit waits before the compressor will start again. Six flashes on this board means the delay is active or the delay timing has been lost.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanmoderatehttps://blinklookup.com/furnace/goodman/apg13/7-flash/https://blinklookup.com/furnace/goodman/apg13/7-flash/The heat pump has hit its high pressure limit five times in a single call for heat. Five times is the point where the control assumes something is genuinely wrong rather than a momentary condition, and it stops. Cooling often still works, which is why people run the unit in summer without realising the heating side is dead.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/furnace/goodman/apg13/8-flash/https://blinklookup.com/furnace/goodman/apg13/8-flash/The indoor thermostat wiring, or a switch on the indoor unit, is reading open. On a heat pump that runs cooling only, this code appears when the control is expecting a closed circuit from the thermostat and is not getting one. It is often a loose wire at the terminal block.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanlowhttps://blinklookup.com/furnace/goodman/apg13/9-flash/https://blinklookup.com/furnace/goodman/apg13/9-flash/On a heat pump running cooling only, this is the outdoor unit reporting that the high pressure switch, the loss of charge switch, or the heat pump mode switch is open. It means the unit has decided it is unsafe to run the compressor, so cooling stops. A low refrigerant charge is a frequent underlying cause.Sat, 26 Sep 2026 00:00:00 GMTFurnaceGoodmanhighhttps://blinklookup.com/ac/goodman/asx13/1-flash/https://blinklookup.com/ac/goodman/asx13/1-flash/The outdoor unit has been running longer than the control expects for the demand. The system is not reaching temperature inside the time it should, so the compressor is staying on. A charge or airflow problem is behind this far more often than a compressor fault.Sat, 26 Sep 2026 00:00:00 GMTAir ConditionerGoodmanhighhttps://blinklookup.com/ac/goodman/asx13/2-flash/https://blinklookup.com/ac/goodman/asx13/2-flash/The unit has tripped on a pressure switch, either high or low, and the control cannot tell you which one without a technician looking at it. Low side usually means a charge problem. High side usually means airflow or a condenser fan problem. The unit will not restart until the pressure returns to normal or the switch is reset.Sat, 26 Sep 2026 00:00:00 GMTAir ConditionerGoodmanhighhttps://blinklookup.com/ac/goodman/asx13/3-flash/https://blinklookup.com/ac/goodman/asx13/3-flash/The compressor is starting and stopping on a cycle much shorter than it should. Either it is losing pressure between starts, it cannot get up to speed, or the control is cutting it off. Sustained short cycling will kill a compressor, so this is worth dealing with even if cooling seems adequate.Sat, 26 Sep 2026 00:00:00 GMTAir ConditionerGoodmanhighhttps://blinklookup.com/ac/goodman/asx13/4-flash/https://blinklookup.com/ac/goodman/asx13/4-flash/The compressor tried to start and seized. Current surged and the control locked out to protect itself. On this unit that usually means a compressor that has actually failed, not a starting problem.Sat, 26 Sep 2026 00:00:00 GMTAir ConditionerGoodmancriticalhttps://blinklookup.com/ac/goodman/asx13/5-flash/https://blinklookup.com/ac/goodman/asx13/5-flash/The compressor circuit is open, meaning the control is trying to run the compressor and getting nothing back. Either the supply voltage to the outdoor unit has dropped, or the circuit is broken somewhere between the board and the compressor. Low incoming voltage is the common cause and it damages compressors quietly over time.Sat, 26 Sep 2026 00:00:00 GMTAir ConditionerGoodmanhighhttps://blinklookup.com/ac/goodman/asx13/6-flash/https://blinklookup.com/ac/goodman/asx13/6-flash/The start winding circuit is open. The compressor has a separate start winding used only during startup, and this code means that winding or its relay is not being energised. On a unit with a potential relay that means the relay has failed; on a modern board it means the board output has failed.Sat, 26 Sep 2026 00:00:00 GMTAir ConditionerGoodmancriticalhttps://blinklookup.com/ac/goodman/asx13/7-flash/https://blinklookup.com/ac/goodman/asx13/7-flash/The run winding circuit is open. The compressor is not getting the current it needs to run at all, even if the start circuit worked. This is either a supply and connection problem or a failed compressor winding.Sat, 26 Sep 2026 00:00:00 GMTAir ConditionerGoodmancriticalhttps://blinklookup.com/ac/goodman/asx13/8-flash/https://blinklookup.com/ac/goodman/asx13/8-flash/The contactor contacts have welded shut. The compressor is being energised whether or not the control wants it running, and the unit cannot start when it is asked to because the contactor never releases. This can put the compressor at risk of short cycling against a control that has no idea it is happening.Sat, 26 Sep 2026 00:00:00 GMTAir ConditionerGoodmancriticalhttps://blinklookup.com/ac/goodman/asx13/9-flash/https://blinklookup.com/ac/goodman/asx13/9-flash/This is a service code used while checking gas pressure, not a fault you will see in normal operation. It reports that pilot voltage is below the level the check needs. If you are seeing it on a display rather than a gauge, the control has lost a setting or the sensor circuit has a problem.Sat, 26 Sep 2026 00:00:00 GMTAir ConditionerGoodmanmoderatehttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-a0/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-a0/The indoor unit is repeating a protection trip that happened in the outdoor unit, so the actual fault is outdoors. On a wired controller the sub-code A0-01 points at the outdoor protection circuit.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-a1/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-a1/The indoor unit control board has detected a fault in itself or in an output it drives, and the unit has stopped. Check the link to the fan board before replacing this board, because C1 and C6 point at that connection specifically.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-a3/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-a3/The condensate drain is not flowing or the water level has reached a point the control will not accept, so the unit has stopped rather than pour water into the room. This is the code that produces a drip in the room below.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinmoderatehttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-a6/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-a6/A grouped code covering a locked fan motor, a fan overcurrent, a fan position error, a motor status error and low airflow. The sub-codes are A6-01, A6-10, A6-11, A6-20 and A6-21. For the overcurrent and position sub-codes Daikin directs you to check the connector between the fan motor and the fan board first, then the motor, then the board, in that order.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-a7/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-a7/The louvre is not moving as commanded. The operation lamp stays lit rather than blinking, so the system keeps heating and cooling and only loses the ability to aim the air. The manual still asks for it to be checked and repaired.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinlowhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-a8/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-a8/The indoor unit has seen a supply voltage outside what it can run on and has shut the fan down to protect itself. Sub-code A8-01 narrows it, and the manual directs checking the input voltage at the fan motor.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-a9/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-a9/The indoor expansion valve is not metering refrigerant correctly, or refrigerant is escaping past it. Sub-code A9-01 is a valve or connector error and A9-02 is a refrigerant leak detection error, where Daikin states the valve leaks even when closed and directs replacing the valve. Dust clogging is listed as its own cause under this code.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-af/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-af/Condensate has risen above the level the unit will accept and the fan has stopped. The operation lamp stays lit, so this is a warning rather than a stop, but the water is real and it is the same drain circuit that produces A3.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinlowhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-ah/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-ah/Only applies to the optional self cleaning cassette panel, and it has seven sub-codes: AH-03 transmission error to the indoor board, AH-04 dust detection sensor, AH-05 dust collection sign, AH-06 air filter rotation, AH-07 damper rotation, AH-08 filter auto clean operation and AH-09 auto clean start disabled. The manual names specific connectors to check rather than a general inspection.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinmoderatehttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-aj/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-aj/A commissioning code rather than a failed part. AJ-01 is a capacity setting error on the indoor board and AJ-02 is an electronic expansion valve setting error, covering the gear type and direct acting type valve settings. Changing the setting is not the same as replacing a board.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinmoderatehttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-c1/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-c1/The indoor control board and the separate fan board are not communicating, so the unit has lost the ability to command or read the blower. C1-01 is the transmission fault and C1-07 is a blower motor communication error. The connector between the two boards is the first thing to check.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-c4/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-c4/The thermistor clipped to the liquid side of the indoor coil is not reporting a value the control can use, so the unit has stopped rather than run on an unmeasurable coil temperature.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinmoderatehttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-c5/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-c5/The thermistor on the gas side of the indoor coil, the vapour line, is not reporting a usable value. The control needs it for the superheat calculation and will not run the unit without it.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinmoderatehttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-c6/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-c6/A compatibility code rather than a failure. C6-01 covers a defective combination of the two boards, a blower motor HP mismatch, an incorrect capacity setting adaptor and an incorrect fan board type, and C6-02 covers an indoor blower that lacks the required parameters.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-c9/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-c9/The sensor that reads air returning to the indoor coil is not reporting a usable value, and the unit has stopped. A blocked return grille is a common contributor, because a sensor sitting in still air reads falsely.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinmoderatehttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-ca/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-ca/The sensor reading the air leaving the indoor coil is not reporting a usable value. The control uses it to judge supply temperature, so it stops rather than guess.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinmoderatehttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-cc/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-cc/The humidity sensing circuit has reported a fault. The operation lamp stays lit and the system keeps running, so the practical effect is that the unit still controls temperature but has lost control of humidity. Daikin still asks for it to be checked and repaired.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinlowhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-ce/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-ce/The optional occupancy sensor has reported a fault. The operation lamp stays lit and the unit keeps heating and cooling, but it has lost the sensing that lets it respond to an empty room.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinlowhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-cj/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-cj/The sensor in the room controller has reported a fault, so the unit has lost or distrusts the room temperature reading. Daikin treats this one differently from the other warnings and says the system may keep running depending on the conditions, which means it may be running on another temperature source in the system.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinlowhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-e1/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-e1/The main board in the outdoor unit has detected a fault in itself or in something it drives, and the outdoor unit has stopped. This is the parent of several outdoor codes, so read the other outdoor codes before replacing this board.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-e3/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-e3/A mechanical high pressure protection has opened and shut the system down. It does not reset on its own, and resetting it without finding why it tripped is the classic way to burn a compressor. A dirty coil, a slow outdoor fan and an overcharge are the usual causes.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-e4/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-e4/The low side pressure has dropped far enough for the low pressure protection to operate and the outdoor unit has shut down. A refrigerant leak, a closed expansion valve and a failing compressor all present this way, and the system usually stops quickly rather than after a long run.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-e5/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-e5/The compressor has failed to start or will not restart, and the outdoor unit has stopped to protect the rest of the system. Check the supply voltage before replacing the compressor, because a voltage problem will destroy the replacement too.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-e7/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-e7/The condensing fan has failed or is reporting a fault and the outdoor unit has stopped. This is not only a comfort fault, because the fan airflow is what keeps head pressure down, so a failed outdoor fan quickly leads to a high pressure trip and, in winter, to icing on the coil.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-e9/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-e9/The outdoor expansion valve is not metering refrigerant correctly and the system has stopped. This is the outdoor counterpart to A9, and on VRV both valves work together to send the charge to the indoor unit that needs it.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-f3/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-f3/The discharge line sensor has read a value the control does not believe, or the discharge temperature has genuinely run outside what the compressor survives. A failed sensor and a real overheat both land here, and they have different fixes.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-f6/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-f6/The system has too much refrigerant for the conditions and has shut down. Daikin lists this as its own code rather than folding it into a pressure code, which tells you it is a distinct condition. An overcharge raises head pressure and discharge temperature and can damage the compressor.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-h9/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-h9/The thermistor reading the air entering the outdoor coil, R1T, has reported a fault. The control needs it to decide when to defrost, so it will not start a heating cycle on an unmeasurable outdoor air temperature.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinmoderatehttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-j3/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-j3/The R2T thermistor on the compressor discharge line has reported a fault. This is the sensor failure code, not the temperature excursion code, and the two have different repairs.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinmoderatehttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-j5/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-j5/Two sensors, R3T and R5T, on the suction line have reported a fault. Superheat cannot be calculated without them, so both need checking rather than only the first one found. Note this is the outdoor suction line sensor, not the C9 indoor return air sensor.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinmoderatehttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-j6/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-j6/The R4T thermistor that monitors the coil during a defrost has reported a fault. The defrost cycle is temperature controlled from this reading, so the control stops rather than guessing and icing the coil. Check for ice or snow on the coil as well, because a buried sensor can be physically damaged.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinmoderatehttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-j7/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-j7/The R7T thermistor on the liquid line leaving the outdoor coil has reported a fault. The control uses it to track what the coil is condensing, so it will not run on an unmeasurable liquid line temperature.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinmoderatehttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-j9/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-j9/The R6T thermistor on the gas line leaving the subcooling heat exchanger has reported a fault. VRV systems use a subcooling heat exchanger rather than a conventional filter drier arrangement, and losing this reading means the control cannot verify subcooling.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinmoderatehttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-ja/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-ja/The high pressure sensor has reported a fault or is reading implausibly. Because this is the sensor behind the high pressure protection, a failure can stop the system from starting at all, and it is a frequent cause of technicians chasing a charge problem that does not exist. Verify against a real gauge first.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-jc/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-jc/The low pressure sensor has reported a fault or is reading implausibly. This is the sensor behind the low pressure protection, so a failure can stop the system from starting, and an implausible reading produces a refrigerant leak that is not there. Verify against a real gauge before searching for a leak.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-l1/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-l1/The board that drives the compressor and outdoor fan with variable speed has reported a fault and the outdoor unit has stopped. It is the most expensive single board on the outdoor unit and the most common age related failure. Check the sensors feeding it before replacing it.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-l4/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-l4/The inverter heat sink fins have risen to a temperature the board will not survive, so the unit has shut itself down to protect the electronics. This is a heat protection fault rather than a refrigerant fault, so the causes are airflow and electronics: a dirty coil, a failed fan, a confined installation or a very high ambient temperature.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-l5/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-l5/The compressor drew more current than the drive accepts in a single moment. This is the drive reacting fast to a spike, which distinguishes it from the sustained overcurrent code. A marginal supply voltage and a hard to start compressor are the usual causes.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-l8/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-l8/The compressor has drawn more current than the drive accepts over a period, and the outdoor unit has stopped. Sustained overcurrent means the compressor is working hard enough to be damaging itself, and low charge, a failing compressor and a condenser problem all present this way.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-l9/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-l9/The compressor has failed to start or has lost synchronism with the drive, and the unit has stopped. It is distinct from E5, which means the motor never turns at all. A supply voltage problem is the most common cause on a compressor that otherwise works.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-lc/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-lc/The microprocessors on the outdoor main board are not communicating with each other, so the outdoor unit has stopped. This is an internal board fault, not a wiring fault between units, which is what separates it from a U4 style communication code.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-m1/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-m1/The board inside the centralized controller has reported a hardware fault. On a building management system this takes the zone offline for central control even though the heating and cooling itself is usually still running, so check the zone before chasing the refrigerant system.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-m8/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-m8/Two or more centralized controllers cannot communicate with each other over the bus that shares information between them. Heating and cooling continues, but the system loses coordinated control and reporting.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinmoderatehttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-ma/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-ma/The centralized controllers are not a combination the system supports, in model, software version or count. This is a compatibility and configuration code rather than a fault in any one controller, and it typically appears when a controller from a different series is added.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinmoderatehttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-mc/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-mc/A centralized controller has a duplicated address or a setting the system will not accept. The system keeps heating and cooling, but the duplicated controller cannot be individually addressed or controlled.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinlowhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-p1/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-p1/The DC bus capacitor in the inverter circuit has charged to a voltage the drive considers abnormal. The capacitor itself is rarely the cause, so look at the power supply section, the drive and the supply voltage upstream. The bus can hold a lethal voltage after the unit is switched off.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-p4/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-p4/The thermistor on the inverter heat sink has reported a fault. The operation lamp stays lit and the system can keep operating, but the unit has lost its most accurate heat sink reading and is relying on a less direct protection. It is the same sensor that feeds the L4 over-temperature shutdown.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinlowhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-u0/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-u0/The system has detected it does not have enough refrigerant. The operation lamp stays lit and the unit keeps running, which is why this code is dangerous: a system short of refrigerant runs a compressor without enough refrigerant to cool its own windings, and continued running destroys the compressor permanently. Treat this as a stop and investigate even though the lamp is on.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-u2/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-u2/The supply is not holding up, either because it is undersized for the connected indoor units or because it was interrupted momentarily. This matters more on VRV than on a single split, because one outdoor unit can feed many indoor units and the combined starting current can exceed a marginal supply.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-u3/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-u3/The installer check operation has not been carried out, so the system will not run. This is a commissioning code rather than a fault, and it most often appears on a new installation or after field settings were changed. It needs the manufacturer commissioning tools.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinmoderatehttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-u4/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-u4/The communication bus between the indoor units and the outdoor unit has failed and the system has shut down. It is a wiring, addressing or board level fault rather than a refrigerant fault, and it is the most common system level code because the bus is sensitive to installation quality and terminations.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-u5/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-u5/The link between the room controller and its indoor unit has failed, so usually one zone is affected rather than the whole system. On a wireless controller the same code covers a pairing or receiver problem rather than a wiring one.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinmoderatehttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-u8/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-u8/In a system with more than one controller, the link between the main controller and the secondary controllers has failed. The controllers are daisy chained to share zone information, and a break in that chain stops the secondary controllers updating. Heating and cooling usually keeps working.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinmoderatehttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-u9/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-u9/Indoor units that share a refrigerant system cannot see each other over the bus, and the system has shut down. Part of the system has dropped off the bus, so identifying which indoor units are offline points directly at where the break is.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-ua/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-ua/The combination of indoor units connected to this outdoor unit is not one the system can run, or an electric heater capacity setting does not match the equipment. A system outside the connectable indoor unit ratio or capacity range reports this rather than attempting to run.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-uc/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-uc/Two centralized controllers have been given the same address, so the system runs but one of them cannot be individually monitored or controlled. The operation lamp stays lit. Listing every controller address and comparing them is the whole of the diagnosis.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinlowhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-ue/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-ue/A centralized controller cannot communicate with an indoor unit it is supposed to control. Unlike U5, this runs through the system bus rather than a short controller cable, so the break can be anywhere between the controller and that unit.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-uf/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-uf/The system has not been set up, so it does not yet know what indoor units are connected. This is a commissioning code shown by a factory fresh system before it has been addressed and configured, and it means not set rather than broken.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinmoderatehttps://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-uh/https://blinklookup.com/heat-pump/daikin/vrv-iv-rxtq/error-code-uh/A system that was running has lost its address, so the outdoor and indoor units no longer agree which system they belong to. It usually follows a power interruption, an incomplete settings change or a board replacement, and the system cannot distribute refrigerant because it does not know what it is connected to.Sat, 26 Sep 2026 00:00:00 GMTHeat PumpDaikinhighhttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-11/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-11/The indoor and outdoor units cannot hold a serial link, so the system stops. Fujitsu is explicit that an error code identifies the detected condition and does not automatically identify the failed part, so the wiring, connectors, sensor values and supply all need checking before anything is replaced.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsuhighhttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-12/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-12/The failure is between the unit and the wired controller or the server room control rather than between the indoor and outdoor units. That distinction matters because it points at the control run and the communication kit, not at the refrigerant circuit. On this series the wired controller is a non-polar two wire device that needs its own communication kit, and the service documentation states that group control using the wired remote controller is prohibited for this product, so a control topology the unit does not support can also end up here.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsumoderatehttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-15/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-15/The unit did not finish its start up check run, or the automatic airflow adjustment step did not complete, so it stopped. This is a commissioning and self test code rather than a failed component, and it points at the process rather than the hardware: the check run measures the system and configures itself, and it cannot complete if a sensor is out of range or the airflow cannot be balanced.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsumoderatehttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-18/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-18/The communication between the unit and something outside it has failed. On this series the service reference lists the external input and output PCB UTY-XCSXZ2, which provides the connection to external devices, and the external connect kit UTY-XWZXZ5, which also requires a communication kit. This is a different link from the indoor to outdoor communication on code 11, and it is the one that comes into play when a unit is wired to a building management system or another external control input.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsumoderatehttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-23/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-23/The combination of equipment connected to this system is not one the unit will run. This is a configuration code rather than a failed component, and it is a code to read alongside 32 and 62, which are the ones that point at a board reporting an identification the unit does not recognise. The unit will not start because it has not been told, or cannot work out, what it is connected to, and a mismatch here will not clear by replacing any part.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsuhighhttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-32/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-32/The indoor unit has read model information from its own main PCB that it does not recognise, so it has stopped. The service reference gives a distinct main PCB identification for each capacity, K18RA-1806HSE-C1 on the ASTG09KMTC and K18RA-1807HSE-C1 on the ASTG12KMTC, and a distinct control unit too, EZ-01836HSEE and EZ-01837HSEM. The unit checks that identification, which is how it knows which sensors and outputs to use, so a board from the wrong capacity, or a failed board, produces this code. The documented test is to read the main PCB identification number.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsuhighhttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-35/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-35/The manual and auto switch on the unit is in an invalid or unexpected position, so the unit cannot tell whether it is being controlled locally or automatically and has stopped. This is a physical switch position fault rather than an electronic one, which makes it one of the cheaper codes on the platform, but it will keep coming back until the switch is put where the unit expects it.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsumoderatehttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-41/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-41/The thermistor that reads the room air has failed, so the unit has stopped because it cannot know what temperature the room is at. The thermistor is the room sensor designated ThR, and the documented test is a resistance check against the table: it should read 33.6 kOhm at 0 C, 12.5 kOhm at 20 C, and 8.0 kOhm at 30 C. Those three numbers are the fastest way to tell a failed sensor from a wiring fault, because a sensor that is open reads infinite and a shorted one reads near zero rather than sitting somewhere off the curve.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsumoderatehttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-42/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-42/The thermistor at the middle of the indoor heat exchanger has failed, so the unit has stopped. This sensor, designated ThHM, is what the control uses to work out how much heat or cold the coil is actually moving, and without it the unit cannot decide how long to run or where to modulate. The documented test is a resistance check against the indoor pipe thermistor curve, which is a different curve from the room sensor: 176.0 kOhm at 0 C, 62.9 kOhm at 20 C, and 39.6 kOhm at 30 C. The much higher resistance at every point is what tells you which sensor you are looking at.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsumoderatehttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-44/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-44/The optional human presence sensor has reported a fault, so the unit has lost the occupancy sensing that lets it respond to an empty room. The service reference lists the optional interfaces for this series as the wired remote controllers, the communication kit, the external input and output PCB, the external connect kit and the wireless LAN adapter, and the human sensor is not among them, so treat the sensor as an add on on the unit you own rather than standard on the range. The practical effect is comfort and running hours rather than a broken machine.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsulowhttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-51/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-51/The indoor blower has failed or the unit has lost the feedback that proves the fan is turning, so it has stopped. On an indoor unit the blower is the one motor the occupant hears and feels, and it is also what moves air across the coil, so this code stops both comfort and the heat transfer. The fan and its drive are on the indoor side, which separates it from the outdoor fan motor code, and that distinction is worth keeping straight because they are different parts in different places.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsuhighhttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-62/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-62/The outdoor unit has either read model information from its own main PCB that it does not recognise, or lost communication with the system. Those are two different faults sharing one code, which is why this one needs a measured check rather than a guess. The documented test on the identification half is to read the main PCB identification, and on this series it differs between the two capacities, so a board from the other size will produce exactly this. The communication half points at the bus between indoor and outdoor.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsuhighhttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-63/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-63/The outdoor inverter has reported a fault and the system has stopped. On this range the inverter assembly is a replaceable unit with its own identification, and it is the part that drives the compressor with variable speed, so an inverter fault is a stop rather than a reduced output condition. It is also the most expensive single part on the outdoor unit, which is why the supporting checks matter: a current sensor fault, a compressor rotor position fault, and a genuine inverter fault all stop the system and are told apart by which code appears.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsuhighhttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-64/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-64/The power factor correction circuit has reported a fault. That circuit corrects the current the unit draws from the supply so that it runs close to unity power factor, which is what keeps the current low and the unit within its supply limits, and a fault here is therefore a supply side and board level fault rather than a refrigerant one. The service reference names this code as the active filter or PFC circuit, so treat the two as one circuit to test, not as two parts to guess between.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsuhighhttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-65/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-65/The unit has detected a trip condition at what the service reference calls terminal L, and has shut down. The reference does not expand this term further, so treat the code as a protection report: read the accompanying codes, and read the R32 refrigerant handling requirement as a reason not to force the unit back on. Fujitsu states plainly that a code identifies the detected condition and not the failed part, and that is exactly the case here.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsuhighhttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-71/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-71/The thermistor on the compressor discharge line has failed, so the unit has stopped rather than run without the reading that protects the compressor. The documented test is a resistance check against the outdoor discharge thermistor curve: 168.6 kOhm at 0 C, 62.6 kOhm at 20 C, and 40.0 kOhm at 30 C. This is a sensor fault and it is not the same as code A1, which is a genuine discharge over-temperature condition, and keeping those two apart matters because one is a part and the other is a refrigerant or airflow problem.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsuhighhttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-73/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-73/The thermistor on the liquid line at the outdoor heat exchanger outlet has failed, so the unit has stopped. The documented test uses the outdoor pipe thermistor curve, which is the steepest of the three outdoor sensors: 16.1 kOhm at 0 C, 6.0 kOhm at 20 C, and 3.8 kOhm at 30 C. Those much lower numbers are the giveaway that you are on the pipe sensor rather than the discharge or outdoor temperature sensor, and mixing the three curves up is the most common mistake when testing them.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsumoderatehttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-74/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-74/The thermistor reading the air entering the outdoor coil has failed, so the unit has stopped. The documented test is a resistance check against the outdoor temperature thermistor curve: 35.2 kOhm at 0 C, 12.6 kOhm at 20 C, and 8.0 kOhm at 30 C. This is the sensor that tells the control what the outdoor conditions are, and on a heat pump it is what decides when to defrost and how much to modulate, so the unit will not run a heating cycle on an unmeasurable outdoor air temperature.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsumoderatehttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-84/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-84/The unit has lost the ability to measure compressor current, so it has stopped. Current sensing is how the control knows what the compressor is doing, and it is what protects the compressor, detects a closed valve, and feeds the inverter. A failure here often travels with a genuine inverter fault or a compressor problem rather than being a failed sensor on its own, so the current sensor, the inverter, and the compressor are checked as a set. The documented test on the compressor side is a winding resistance check.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsuhighhttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-94/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-94/The unit has detected a trip condition and shut down. This is a protection report rather than a diagnosis, which is why Fujitsu states plainly that a code identifies the detected condition and not the failed part. On this R32 range a trip can be electrical, refrigerant related, or a temperature protection, and the specific cause is found by reading the codes that accompany it. It is also the code that appears when the unit has actually tripped rather than merely detected a sensor fault, so it should be read as a stop and investigated.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsuhighhttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-95/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-95/The unit has lost track of where the compressor rotor is, so it cannot start the motor and has stopped. The drive has to establish rotor position before it will run the compressor, and when that measurement is wrong or missing the motor will not start. A failed inverter assembly, a compressor that can no longer be measured correctly, a wiring problem at the compressor, or a supply outside the available range all produce it, and it is closely related to the inverter and current sensor codes.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsuhighhttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-97/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-97/The outdoor condensing fan has failed and the system has stopped. The service reference names this code for fan motor 1, so a unit with more than one outdoor fan has this code for the first one. A failed outdoor fan is not only a comfort fault: the condenser airflow is what keeps head pressure down, so it quickly turns into a high pressure or over-temperature trip, and in winter it can lead to ice on the outdoor coil. This is the outdoor counterpart to code 51, which is the indoor fan, and they are different parts in different places.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsuhighhttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-99/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-99/The reversing valve that switches the system between heating and cooling has not moved to the position the control asked for, so the unit has stopped. A four way valve is an electrically actuated valve with no manual override, and because it decides the direction of refrigerant flow, a fault is nearly always visible as one mode working and the other not. The documented check is the coil resistance, and testing it is the difference between a valve change and a board change.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsuhighhttps://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-a1/https://blinklookup.com/mini-split/fujitsu/airstage-km-tc/error-code-a1/The compressor discharge temperature has genuinely run too high and the unit has stopped to protect itself. This is a real over-temperature condition rather than a failed sensor, and it is the fault that destroys compressors when it is ignored. The causes sit in the refrigerant circuit, the charge, the electronic expansion valve, and the condenser, and the measured or verified item on this platform is the expansion valve coil, which has its own resistance value of 46.0 Ohm at 20 C. Keep this separate from code 71, which is a failed discharge temperature sensor producing a similar stop.Sat, 26 Sep 2026 00:00:00 GMTMini SplitFujitsuhighhttps://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/status-off/https://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/status-off/The lamp is not blinking and there is nothing wrong. On this equipment the fault indication is blinks, so an unlit lamp means the system is running normally or is switched off. What you are looking for is a pattern, not a light.Sat, 26 Sep 2026 00:00:00 GMTMini SplitMitsubishi Electricnot-a-faulthttps://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-1/https://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-1/Beep and an immediate blink means the indoor room temperature thermistor is short or open circuit, detected every eight seconds during operation. A three second steady lamp first with no beep means the outdoor unit cannot receive signals from the inverter board normally for three minutes, or a zero signal is being answered with a one signal thirty times in a row.Sat, 26 Sep 2026 00:00:00 GMTMini SplitMitsubishi Electrichighhttps://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-2/https://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-2/Beep and an immediate blink means the indoor coil thermistor is short or open circuit, detected every eight seconds during operation. A three second hold first means the outdoor overcurrent protection cut-out has operated three consecutive times within one minute after the compressor started, and the manual directs reconnecting the compressor connector and checking the stop valve.Sat, 26 Sep 2026 00:00:00 GMTMini SplitMitsubishi Electrichighhttps://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-3/https://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-3/The most overloaded code on the platform. Beep and an immediate blink is a serial signal fault, where the signal from the outdoor unit is not received for up to six minutes. A three second hold is an outdoor thermistor short or open during compressor running, and the inverter board LED then says which one: once for the discharge temperature or defrost thermistor, twice for ambient, three times for fin, four times for the P.C. board, and no LED at all for the outdoor heat exchanger thermistor.Sat, 26 Sep 2026 00:00:00 GMTMini SplitMitsubishi Electrichighhttps://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-4/https://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-4/An outdoor fault, split by the inverter LED. Eleven LED blinks is a large current flowing into the power module on the smaller models or the IGBT module on the GL24. Twelve LED blinks is a compressor synchronous abnormality, which the manual also calls the compressor startup failure protection, where the compressor current waveform is distorted.Sat, 26 Sep 2026 00:00:00 GMTMini SplitMitsubishi Electrichighhttps://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-5/https://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-5/The discharge temperature thermistor has exceeded 241 F, which is 116 C, and the compressor has stopped. The restart condition is exact: the compressor can restart once the thermistor reads 212 F, which is 100 C, or less, three minutes later. The manual points at the refrigerant circuit and charge, and at the electronic expansion valve.Sat, 26 Sep 2026 00:00:00 GMTMini SplitMitsubishi Electrichighhttps://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-6/https://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-6/The limit is set on the coil sensors rather than a pressure switch. In HEAT mode the indoor coil thermistor must not exceed 158 F, which is 70 C, and in COOL mode the defrost thermistor must not exceed 158 F either. The manual points at the refrigerant circuit and amount, and the stop valve.Sat, 26 Sep 2026 00:00:00 GMTMini SplitMitsubishi Electrichighhttps://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-7/https://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-7/The electronics got too hot and the unit shut down. The thresholds differ by model size: fin temperature 167 to 187 F, which is 75 to 86 C, on the GL09 through GL18 but 167 to 176 F, which is 75 to 80 C, on the GL24, and P.C. board temperature 162 to 185 F, which is 72 to 85 C, on the GL09 through GL18 but 158 to 167 F, which is 70 to 75 C, on the GL24. The inverter LED blinks seven times for this one.Sat, 26 Sep 2026 00:00:00 GMTMini SplitMitsubishi Electrichighhttps://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-8/https://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-8/The condition is specific: the outdoor fan has stopped three times in a row within thirty seconds after outdoor fan startup, which is the drive detecting a stalled fan. The manual directs checking the outdoor fan motor and then the inverter P.C. board, in that order.Sat, 26 Sep 2026 00:00:00 GMTMini SplitMitsubishi Electrichighhttps://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-9/https://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-9/Split by the inverter LED into two very different faults. A five time LED blink means the non-volatile memory data cannot be read properly and the manual gives one remedy, replace the inverter P.C. board. A six time LED blink means the interface has short circuited in the output of the power or IGBT module, or the compressor winding itself has short circuited.Sat, 26 Sep 2026 00:00:00 GMTMini SplitMitsubishi Electrichighhttps://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-10/https://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-10/The opposite of five blinks, and usually a leak. The condition is a discharge temperature thermistor reading of 122 F, which is 50 C, or less, continuously for twenty minutes. A compressor that cannot get its discharge hot is not getting enough refrigerant, and the manual points at the electronic expansion valve and the refrigerant circuit and amount.Sat, 26 Sep 2026 00:00:00 GMTMini SplitMitsubishi Electrichighhttps://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-11/https://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-11/Beep and an immediate blink is the indoor fan motor, where the rotational frequency feedback signal is not emitted for twelve seconds after the fan is operated. A three second hold is the outdoor side, split again by the LED: eight LED blinks means the inverter bus-bar voltage cannot be detected normally, and nine LED blinks means each phase current of the compressor cannot be detected normally.Sat, 26 Sep 2026 00:00:00 GMTMini SplitMitsubishi Electrichighhttps://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-12/https://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-12/The indoor electronic control board cannot properly read the data in its own non-volatile memory, and the remedy in the manual is a single one: replace the indoor electronic control P.C. board. Do not confuse it with a nine blink, which is the outdoor inverter board and needs a different part.Sat, 26 Sep 2026 00:00:00 GMTMini SplitMitsubishi Electrichighhttps://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-14/https://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-14/Split by the inverter LED. A fourteen time LED blink is a closed stop valve, detected by compressor current. A sixteen time LED blink is the four way valve not working properly, or the indoor coil thermistor detecting an abnormal temperature, and the manual lists checking the four way valve and replacing the inverter board for that one.Sat, 26 Sep 2026 00:00:00 GMTMini SplitMitsubishi Electrichighhttps://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-16/https://blinklookup.com/mini-split/mitsubishi-electric/gl-mr-slim/error-code-16/A closed valve and air trapped in the refrigerant circuit are detected from the temperature sensed by the indoor and outdoor thermistors together with the current of the compressor, so the unit is inferring a pipework fault rather than measuring pressure directly. The manual directs checking for a gas leak in the connecting piping, checking the stop valve, and checking the outdoor refrigerant circuit.Sat, 26 Sep 2026 00:00:00 GMTMini SplitMitsubishi Electrichighhttps://blinklookup.com/water-heater/bosch/therm-250sx/error-code-8e/https://blinklookup.com/water-heater/bosch/therm-250sx/error-code-8e/The control board has picked up electronic noise. As with E0, a single occurrence does not mean a bad board, and it can be triggered by the wrong combination of buttons being pressed.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBoschlowhttps://blinklookup.com/water-heater/bosch/therm-250sx/error-code-a2/https://blinklookup.com/water-heater/bosch/therm-250sx/error-code-a2/A safety device in the upper half of the heater has opened the circuit because it got too hot. On early units it is a white overheat fuse wrapped around the heat exchanger that trips at about 355 degrees F, and on newer units it is a flue gas limiter in the upper corner of the cabinet that trips above 220 degrees F in the upper chamber. Before you act on it, check the platform: on the Greentherm T9000, A2 means an external temperature sensor is not detected, which is a wiring fault with no temperature threshold at all and no overheat involved.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBoschcriticalhttps://blinklookup.com/water-heater/bosch/therm-250sx/error-code-a7/https://blinklookup.com/water-heater/bosch/therm-250sx/error-code-a7/The sensor clipped to the hot water pipe at the bottom of the unit is reporting a temperature the control does not believe. Bosch warns against assuming the sensor is at fault, because on a scaled heat exchanger the sensor is correctly reporting a real overheat. On the Greentherm T9000, A7 means the heat exchanger outlet water sensor is not detected, which is a wiring fault rather than a temperature reading.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBoschmoderatehttps://blinklookup.com/water-heater/bosch/therm-250sx/error-code-a9/https://blinklookup.com/water-heater/bosch/therm-250sx/error-code-a9/The outlet sensor is not reporting the temperature the control expected, from a temperature undershoot or overshoot. It can flash while the heater keeps running or shut the heater down, and the control board software version affects how it presents. On the Greentherm T9000, A9 means output power is too low, which is a gas pressure fault and has nothing to do with the outlet sensor.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBoschmoderatehttps://blinklookup.com/water-heater/bosch/therm-250sx/error-code-c1/https://blinklookup.com/water-heater/bosch/therm-250sx/error-code-c1/The fan speed was below the range the control accepts when the unit tried to start. A single occurrence right after another code was reset, or after the heater was cycled quickly while the fan was still purging, is expected and not a concern. On the Greentherm T9000, C1 means a vent blockage was detected, which has nothing to do with fan speed.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBoschmoderatehttps://blinklookup.com/water-heater/bosch/therm-250sx/error-code-c6/https://blinklookup.com/water-heater/bosch/therm-250sx/error-code-c6/The fan speed dropped below the acceptable range while the heater was running. Bosch publishes no single common cause for it, and the diagnostic is the same fan and flue check as C1.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBoschmoderatehttps://blinklookup.com/water-heater/bosch/therm-250sx/error-code-c7/https://blinklookup.com/water-heater/bosch/therm-250sx/error-code-c7/The control is getting no fan speed feedback at all. Bosch associates this with water or condensation damage from improper installation, and warns that a water damaged fan means the gas valve is probably damaged too, so replacing the fan alone will not fix the heater.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBoschhighhttps://blinklookup.com/water-heater/bosch/therm-250sx/error-code-ca/https://blinklookup.com/water-heater/bosch/therm-250sx/error-code-ca/The inlet flow sensor has measured more than about 10 gallons per minute through the unit. Bosch describes this as almost always a plumbing problem rather than a heater problem, usually unusually high incoming water pressure.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBoschmoderatehttps://blinklookup.com/water-heater/bosch/therm-250sx/error-code-e0/https://blinklookup.com/water-heater/bosch/therm-250sx/error-code-e0/The control board has reported an internal failure. A single E0 does not mean a bad board, but repeated E0 codes do. It can also come from a button combination entered by mistake while resetting or changing a setting.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBoschhighhttps://blinklookup.com/water-heater/bosch/therm-250sx/error-code-e1/https://blinklookup.com/water-heater/bosch/therm-250sx/error-code-e1/The hot water sensor on the pipe leaving the heat exchanger has measured more than 185 degrees F and the unit has shut down. Bosch treats this as potentially serious and says not to assume the sensor is at fault, because scale on the heat exchanger or pre-heated water fed in from a recirculation loop will produce the same reading.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBoschcriticalhttps://blinklookup.com/water-heater/bosch/therm-250sx/error-code-e2/https://blinklookup.com/water-heater/bosch/therm-250sx/error-code-e2/The cold water temperature sensor feeding the heat exchanger is reporting something the control does not accept. Bosch does not want a technician assuming a bad sensor, because the reading may be correct.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBoschmoderatehttps://blinklookup.com/water-heater/bosch/therm-250sx/error-code-e9/https://blinklookup.com/water-heater/bosch/therm-250sx/error-code-e9/The green and white overheat sensor on the upper right corner of the heat exchanger has opened because it sensed over 220 degrees F. It resets itself once the unit cools but the code still needs the reset button. Bosch says the usual cause is scale build-up in the heat exchanger, often with banging or knocking from the unit.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBoschcriticalhttps://blinklookup.com/water-heater/bosch/therm-250sx/error-code-ea/https://blinklookup.com/water-heater/bosch/therm-250sx/error-code-ea/The burner never showed a flame and the unit gave up after its ignition attempts. The cause is almost always on the gas supply side, such as no gas, air in the lines, low pressure or a damaged gas valve, with a weak ignition spark or failed flame sensor also possible.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBoschhighhttps://blinklookup.com/water-heater/bosch/therm-250sx/error-code-ec/https://blinklookup.com/water-heater/bosch/therm-250sx/error-code-ec/The heater lost flame while running, and raises EC when the ionization signal disappears more than three times in less than thirty seconds. Causes sit in combustion quality: low gas pressure, air to fuel adjustment, dirty electrodes or a damaged gas valve. It is often accompanied by groaning during start-up.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBoschhighhttps://blinklookup.com/water-heater/bosch/therm-250sx/error-code-f7/https://blinklookup.com/water-heater/bosch/therm-250sx/error-code-f7/The heater thinks it is sensing burner flame while it is in standby, which is a gas safety problem rather than a nuisance code. Bosch points at a damaged gas valve or flame sensor, most likely from rain or condensate inside the unit.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBoschhighhttps://blinklookup.com/water-heater/bosch/therm-250sx/error-code-fa/https://blinklookup.com/water-heater/bosch/therm-250sx/error-code-fa/The heater still thinks it is sensing flame after it has shut down, so the control is asking whether gas is still flowing. Bosch directs checking for moisture behind the cloud shaped plate held by three screws just above the gas valve, which is typically a sign of a leaking heat exchanger.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBoschcriticalhttps://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/status-heartbeat/https://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/status-heartbeat/The light brightens and dims in a slow heartbeat because the tank has dropped below the setpoint and the control is asking the burner to fire. Seeing this means the appliance is working as designed.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBradford Whitenot-a-faulthttps://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/status-nopower/https://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/status-nopower/There is no light on the gas control at all. The power switch on the control is off, the supply has been interrupted, or the unit is unplugged. The burner has not been asked to do anything yet, because the control has not started.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBradford Whitenot-a-faulthttps://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/status-standby/https://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/status-standby/The water is already at the setpoint and the control is idle, waiting for somebody to draw hot water. This is the normal state of a working appliance and it is not a fault, though it is the state that gets mistaken for one most often.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBradford Whitenot-a-faulthttps://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/2-flash/https://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/2-flash/The control powers the flue damper and checks where it ended up. This code means the damper is not where it should be, most often because it is stuck open, which lets combustion gases out around the draft hood instead of up the flue.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBradford Whitehighhttps://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/3-flash/https://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/3-flash/The damper responded but stopped short of fully open, so the burner is firing with a restricted draft path. The unit will not hold temperature and the burn is incomplete while it is in that state.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBradford Whitehighhttps://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/4-flash/https://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/4-flash/The tank went above the temperature the control will accept and the burner was shut off. The control stopped it before the temperature and pressure relief valve had to, which is why the unit needs resetting rather than simply restarting.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBradford Whitecriticalhttps://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/5-flash/https://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/5-flash/The pilot valve is staying open when the control has commanded it shut, so the control sees a flame with no burner command. The manufacturer answer on this unit is to replace the gas control, because the valve that is leaking is the valve that controls gas.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBradford Whitehighhttps://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/7-flash/https://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/7-flash/The FVIR system has tripped. A flammable vapour sensor and a resettable thermal switch sit in the combustion path, and this code means one of them has locked the burner out because of a vapour present, moisture on the sensor, an extreme temperature, or an open thermal switch.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBradford Whitecriticalhttps://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/61-flash/https://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/61-flash/The control called for a pilot and it did not establish, so the unit shut down and reset itself. Almost every occurrence comes down to an unstable pilot, a blocked pilot tube, oxidation on the pilot electrode, or damaged pilot wiring.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBradford Whitehighhttps://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/62-flash/https://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/62-flash/The damper opened correctly and then moved while the burner was on, which the control treats as a fault. Something has usually been moved or hit near the flue, and the control waits five minutes before resetting itself.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBradford Whitehighhttps://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/63-flash/https://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/63-flash/The pilot was lit and went out on its own, so the control reset. It shares its root causes with a pilot that will not light, and adds two more that only show up once the pilot is running: not enough combustion air, or gas pressure below what the pilot needs to hold.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBradford Whitehighhttps://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/64-flash/https://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/64-flash/The same stuck pilot valve as the five flash code, reported in the group that resets automatically. The distinction is that this one retries on its own, which can make it look less serious than it is, because a gas valve that will not shut off does not become safe by being retried.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBradford Whitehighhttps://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/81-flash/https://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/81-flash/The vapour sensor is not reporting a believable result, which is a different problem from a real vapour trip. A trip means something about the room, and this means something about the sensor, usually moisture, age, or damaged wiring.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBradford Whitehighhttps://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/82-flash/https://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/82-flash/The sensor reporting tank temperature is not giving a reading the control can trust, either because its resistance is out of range or because the wire to it is damaged. The unit stops rather than run on a temperature it cannot measure.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBradford Whitehighhttps://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/83-flash/https://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/83-flash/The control has found a fault in its own electronics, and the manufacturer lists two causes: it needs a reset, or it is wet or physically damaged. The second is worth taking seriously, because a control that has been wet will keep coming back.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBradford Whitehighhttps://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/84-flash/https://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/84-flash/The control has found a fault in the gas valve or its drive and cannot confirm the gas is shut, so it treats this as a hard stop. Guidance is to interrupt the power first, then replace the gas control if the fault returns.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBradford Whitecriticalhttps://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/91-flash/https://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/91-flash/The unit has measured that it is not getting enough air to burn cleanly and it says so directly. On an atmospheric unit that is usually the room the appliance is in rather than the flue, and the same shortage is what lets combustion gases collect where they should not.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBradford Whitecriticalhttps://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/92-flash/https://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/92-flash/The sensor in the combustion chamber has drifted out of calibration or has shorted. It is a chamber measurement rather than a tank one, and because it protects the chamber the unit will not run on a reading it does not trust.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBradford Whitecriticalhttps://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/error-code-weak/https://blinklookup.com/water-heater/bradford-white/uln-d-series-gas/error-code-weak/The control is not getting a steady enough reading from the pilot flame to trust it, and it flags the last call for heat. It is the early warning for a pilot that is about to drop out, and it is worth acting on now rather than when there is no hot water.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterBradford Whitemoderatehttps://blinklookup.com/water-heater/ao-smith/series-310/error-code-03/https://blinklookup.com/water-heater/ao-smith/series-310/error-code-03/The configuration switches on the control board do not match how the unit is installed. Gas type, altitude and the venting arrangement are all set with these switches, and the control reads them at power-up, so a wrong setting stops the unit before it heats anything.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterAO Smithhighhttps://blinklookup.com/water-heater/ao-smith/series-310/error-code-10/https://blinklookup.com/water-heater/ao-smith/series-310/error-code-10/This is the warning stage, not the shutdown. The control has measured something wrong with the air moving through the unit and it expects the combustion lockout code to follow if the condition is not cleared. Treat it as the last cheap opportunity to fix an air supply or venting problem before the unit stops making hot water.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterAO Smithcriticalhttps://blinklookup.com/water-heater/ao-smith/series-310/error-code-11/https://blinklookup.com/water-heater/ao-smith/series-310/error-code-11/The gas valve opened and the control commanded a spark three times without ever confirming a flame, so it shut the gas off and stopped trying. The flame never established at all here, which is what separates this code from a loss of flame.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterAO Smithcriticalhttps://blinklookup.com/water-heater/ao-smith/series-310/error-code-12/https://blinklookup.com/water-heater/ao-smith/series-310/error-code-12/The burner lit and then went out while the unit was heating, three attempts in a row, and the control closed the gas each time. Something is extinguishing a flame that did establish, so the gas supply itself is less likely to be the cause than air supply, a heat exchanger leak, or flame sensing.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterAO Smithcriticalhttps://blinklookup.com/water-heater/ao-smith/series-310/error-code-32/https://blinklookup.com/water-heater/ao-smith/series-310/error-code-32/The temperature sensors in the water circuit are reporting a resistance the control does not consider possible, which means the circuit is open or shorted rather than simply reading high or low. Scale on the sensors is the common cause, and it does the same job in a tankless unit as it does in a tank.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterAO Smithhighhttps://blinklookup.com/water-heater/ao-smith/series-310/error-code-39/https://blinklookup.com/water-heater/ao-smith/series-310/error-code-39/The air-fuel ratio rod is the sensor that tells the control how cleanly the burner is burning, and this code means it is not reporting a usable result. AO Smith lists a sooted rod and a broken wire to it as the two causes.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterAO Smithhighhttps://blinklookup.com/water-heater/ao-smith/series-310/error-code-55/https://blinklookup.com/water-heater/ao-smith/series-310/error-code-55/The control found an abnormal reading from the gas valve assembly, which covers the main valve, the manifold solenoid and the wiring between them. The unit closes the gas and stops, because a fault in the part that controls gas flow is a hard stop rather than a retry.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterAO Smithcriticalhttps://blinklookup.com/water-heater/ao-smith/series-310/error-code-61/https://blinklookup.com/water-heater/ao-smith/series-310/error-code-61/A condensing unit pulls its combustion gases through the heat exchanger with a fan and the control verifies the fan is turning. This code means it is not getting a believable signal, or the fan is not moving enough air, and the unit will stop on it.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterAO Smithhighhttps://blinklookup.com/water-heater/ao-smith/series-310/error-code-70/https://blinklookup.com/water-heater/ao-smith/series-310/error-code-70/The control reported a fault with itself, usually on its own power-up check rather than in response to anything the appliance measured. A burnt or backed-off connection on the board produces the same code without the board itself being the failed part, so check the connectors before condemning it.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterAO Smithhighhttps://blinklookup.com/water-heater/ao-smith/series-310/error-code-72/https://blinklookup.com/water-heater/ao-smith/series-310/error-code-72/The control thought it saw a flame when no burner was commanded and shut down to be safe. The flame rod is usually picking up a stray signal, often from soot, a leaking heat exchanger, or a condensate problem rather than a real flame.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterAO Smithhighhttps://blinklookup.com/water-heater/ao-smith/series-310/error-code-74/https://blinklookup.com/water-heater/ao-smith/series-310/error-code-74/The unit and its remote controller are not talking to each other. The appliance will normally still run, so this is usually a comfort fault, but it takes away the set temperature and the fault history you would use to work out what the unit is doing.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterAO Smithmoderatehttps://blinklookup.com/water-heater/ao-smith/series-310/error-code-99/https://blinklookup.com/water-heater/ao-smith/series-310/error-code-99/This is the lockout the warning code points to. The control measured exhaust it could not accept, decided the burner was not running cleanly, and shut the gas off. On a sealed combustion unit this is the carbon monoxide protection working, and the cause is always upstream of it, in air supply, a heat exchanger leak, or a dirty burner.Sat, 26 Sep 2026 00:00:00 GMTWater HeaterAO Smithcritical