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Goodman gas furnace code ECF: Gas valve stepper motor communication error
Gas furnace, Canada and United States
The control board cannot communicate with the stepper motor on the modulating gas valve, and the furnace does not run.
This needs a licensed gas technician. There is nothing safe to check yourself. Leave the covers on and book a professional.
This involves the gas supply or burner. Only a licensed technician should open the unit or work on gas parts.
Only some models show this code. Check the list below.
What causes it
-
The gas valve harness is not plugged into the valve and the board, or there is no power to the gas valve. A technician checks the harness and the voltage.
How to read this code on your unit
The code shows on the three-character display on the furnace control board, which you can see through the sight glass on the blower compartment. IdL means the furnace is idle and normal. A blank display means the board has no power or has failed.
Booking a licensed gas technician
Book a licensed gas technicianlicensed gas technician
- Turn the unit off and leave the covers on. Gas components must only be serviced by a licensed technician.
- Note the code, how often it appears, and the model and serial numbers from the rating label.
- Book a licensed gas technician and give them those details.
Models that show this code
15 models in 2 ranges
| Range | Models |
|---|---|
| GMVM97 / GCVM97 / AMVM97 / ACVM97 | GMVM970603BN, GMVM970803BN, GMVM970804CN, GMVM971005CN, GMVM971205DN, AMVM970603BN, AMVM970803BN, AMVM970804CN, AMVM971005CN, AMVM971205DN |
| GRVM97 / GDVM97 | GRVM970603BN, GRVM970803BN, GRVM970804CN, GRVM971005CN, GRVM971205DN |
Where this comes from
- GMVM97/GCVM97 (revision B) modulating gas furnace installation instructions (IOG-2017H) , page 47
- GRVM97/GDVM97 modulating gas furnace installation instructions (IOG-2045A) , page 52
Checked against the manufacturer's manual on 13 October 2026.
Other Goodman gas furnace codes
| Code | Meaning | What you can do |
|---|---|---|
| EbF | Inducer communication error | Call a pro |
| EbL | Blower motor drawing too little current (hard lockout) | Call a pro |
| EbU | Blower motor drawing current during pre-purge (hard lockout) | Call a pro |
| EC | Inducer motor overcurrent | Call a pro |
| Ed | Manual-reset rollout switch open | Call a pro |
| Ed0 | No shared data loaded on the control board | Call a pro |
| Ed1 | Invalid shared data | Call a pro |
| Ed8 | Invalid call, outdoor unit setting does not match | Call a pro |
| EEb | Gas valve not powered when it should be | Call a pro |
| EEC | Gas valve powered when it should be off | Safe checks first, then a pro |
| 1 red flash | Ignition failure or gas valve fault (depends on model) | Safe checks first, then a pro |
| 10 red flashes | Power supply problem or gas valve fault (depends on model) | Depends on your model |
See all gas valve fault codes on gas furnaces across brands.