Goodman GMVC95 error code d4
Invalid memory card data
Which models this applies to. This page covers the Goodman and Amana GMVC95, GCVC95, GCVC96 alphanumeric codes.
What is specific to the GMVC95 platform
Similar to GMVM96 but has no rollout code, which changes the safety story.
Your control board prints the code as text, for example F01 or EE3, so you read it off the display rather than counting blinks. The printed number is the fault itself, not a position in a table.
Quick answer
On Goodman GMVC95 (2000s-2010s), d4 is a fault. It means invalid memory card data. A first thing to check: Memory card from a different model.
- Applies to
- Goodman GMVC95
- Goodman and Amana GMVC95, GCVC95, GCVC96 alphanumeric codes · Furnace · 2000s-2010s
- Type of code
- Fault
- Urgency: Needs attention soon
- First safe check
- Note the model number on the card and confirm it matches the furnace.
What d4 means on this model
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.
Symptoms you will notice
- Code present at power up
- Furnace runs but settings seem wrong
- Blower runs at unexpected speeds
- Installer settings lost after a service visit
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:
- Memory card from a different model
- Card read failure
- Write interrupted by a power loss during commissioning
- Failed control board memory
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.
- Note the model number on the card and confirm it matches the furnace.
- Record any installer settings before the card is removed.
Do not do these
- ×Do not power the furnace off while a card is being written.
- ×Do not copy settings from a different model. Wrong blower and limit settings can damage the unit.
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.
Recording settings is fine. Re-commissioning a furnace is technician work.
What it costs to fix
Parts
Memory card $20 to $60. Control board $250 to $500.
Labor
One to two hours, more if the settings have to be rebuilt.
DIY or technician
Recording settings is fine. Re-commissioning a furnace is technician work.
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 GMVC95, GCVC95, GCVC96 alphanumeric codes
- How this model reports the code
- Printed on the control display
- Models in scope
- Goodman GMVC95, 2000s-2010s
- How this platform differs
- Similar to GMVM96 but has no rollout code, which changes the safety story.
- 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.