Goodman, Amana, Daikin GMVM96 error code b6
Blower motor voltage or over temperature trip
Goodman is the platform name, and your unit may not say it
Amana AMVM96 / ACVM96, Daikin GMVM96 platform are the same board with a different badge, so this page covers all of them. The fault, the checks and the parts are identical, which is why there is one page rather than one per brand.
Quick answer
On Goodman GMVM96 (2010s), b6 is a fault. It means blower motor voltage or over temperature trip. A first thing to check: Restricted airflow loading the motor.
- Applies to
- Goodman GMVM96
- Goodman and Amana GMVM96, GMVM97, GCVM96 alphanumeric codes · Furnace · 2010s
- Type of code
- Fault
- Urgency: Needs attention soon
- First safe check
- Replace the filter and open all the registers and grilles.
What b6 means on this model
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.
Symptoms you will notice
- Blower runs, then trips after a while
- Short-cycling blower
- Code appears on long calls rather than at start
Common causes
The code tells you what the control detected, not which part failed. These are the causes we see most often, roughly in order of likelihood:
- Restricted airflow loading the motor
- Low supply voltage
- Motor winding damage or failing internal overload protection
- Failed capacitor
- Control board fault
What you can safely check
These are homeowner-level checks. None of them need you to open a live electrical compartment or work on gas.
- Replace the filter and open all the registers and grilles.
- Check the breaker and the disconnect for heat or discolouration.
Do not do these
- ×Do not keep it running on a restricted system. Sustained overcurrent trips cook the motor windings.
When to call a technician
Book a technician, do not keep resetting it
This fault will not clear on its own. Every power cycle gives the control one more failed attempt, and repeated attempts are what turn a cheap part replacement into a seized or contaminated system.
- This is a fuel-burning appliance, so treat anything involving a burner, gas valve or flue as technician work. If you smell gas at any point, leave the property and call the gas utility from outside rather than continuing to diagnose.
- If the appliance has stopped mid-cycle, is making a noise you have not heard before, or smells burnt, stop reading here and call. Those are symptoms of something the fault code does not describe well enough.
Filters and airflow are homeowner work. Motor and board are not.
What it costs to fix
Parts
Motor $250 to $500. Filter $8 to $40. Control board $250 to $500.
Labor
Three to five hours.
DIY or technician
Filters and airflow are homeowner work. Motor and board are not.
Typical US part and labor ranges, 2026. They vary by region, model and contractor, so treat them as a planning figure, not a quote.
Scope of this code
- Code table
- Goodman and Amana GMVM96, GMVM97, GCVM96 alphanumeric codes
- Models in scope
- Goodman GMVM96, 2010s
- Checked
- Confirm on your own unit
- Find the model number on the data plate, then check this code in the service manual for that model. Manufacturers revise code tables between model years, and a revised board can renumber a fault.