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Goodman gas furnace 12 red flashes: Flue or venting fault / ignition failure
Gas furnace, Canada and United States
This code means one of two things, depending on your model. Find your model family below, then read the section for it. The model number is on the rating label on the side of the unit.
Find your model family
| If you have | It means |
|---|---|
| GMES80 / GCES80 / AMES80 / ACES80, GMES92, GMES96 / GCES96 / AMES96 / ACES96 | Inducer relay fault or improper grounding |
| GMEC96 / GCEC96 / AMEC96 / ACEC96 | Igniter relay not powering the igniter |
Inducer relay fault or improper grounding
On GMES80 / GCES80 / AMES80 / ACES80, GMES92, GMES96 / GCES96 / AMES96 / ACES96.
The control found a fault in the inducer circuit or in the furnace's grounding, 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 flue or exhaust. A blocked or leaking flue can let carbon monoxide into the home.
What causes it
-
The inducer is connected wrongly.
-
The inducer has failed, or there is a blockage in the inducer or the vent.
-
A poor unit ground.
-
A faulty integrated control board.
How to read this code on your unit
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
75 models in 3 ranges
| Range | Models |
|---|---|
| GMES80 / GCES80 / AMES80 / ACES80 | GMES800403AN, GMES800403AX, GMES800603AN, GMES800603AX, GMES800603BN, GMES800603BX, GMES800604BN, GMES800604BX, GMES800803BN, GMES800803BX, GMES800804BN, GMES800804BX, GMES800804CN, GMES800804CX, GMES800805CN, GMES800805CX, GMES801005CN, GMES801005CX, GMES801205DN, AMES800403AX, AMES800603AX, AMES800603BN, AMES800604BX, AMES800803BX, AMES800804BX, AMES800804CX, AMES800805CX, AMES801005CX, AMES801205DX, GCES800403AN, GCES800403AX, GCES800603AN, GCES800603AX, GCES800804BN, GCES800804BX, GCES801005CN, GCES801005CX, ACES800403AN, ACES800403AX, ACES800603AN, ACES800603AX, ACES800804BX, ACES801005CX |
| GMES92 | GMES920403AN, GMES920603BN, GMES920803BN, GMES920804CN, GMES920805CN, GMES921004CN, GMES921005CN, GMES921205DN |
| GMES96 / GCES96 / AMES96 / ACES96 | GMES960403AN, GMES960603BN, GMES960803BN, GMES960804CN, GMES960805CN, GMES961005CN, GMES961205DN, AMES960403AN, AMES960603BN, AMES960803BN, AMES960804CN, AMES960805CN, AMES961005CN, AMES961205DN, GCES960403BN, GCES960603BN, GCES960804CN, GCES961005CN, GCES961205DN, ACES960403BN, ACES960603BN, ACES960804CN, ACES961005CN, ACES961205DN |
Where this comes from
- GMES80 gas furnace installation instructions (IOG-2021H) , page 31
- GMES92/GMES96 gas furnace installation instructions (IOG-2020J) , page 42
Checked against the manufacturer's manual on 15 October 2026.
Igniter relay not powering the igniter
On GMEC96 / GCEC96 / AMEC96 / ACEC96.
The igniter relay on the control board is not energising the igniter, 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.
What causes it
-
The igniter relay on the control board has failed, and the control board needs replacing.
How to read this code on your unit
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
30 models in 1 range
| Range | Models |
|---|---|
| GMEC96 / GCEC96 / AMEC96 / ACEC96 | GMEC960302BN, GMEC960303AN, GMEC960402BN, GMEC960403AN, GMEC960603AN, GMEC960603BN, GMEC960803BN, GMEC960804CN, GMEC961004CN, GMEC961005CN, GMEC961205DN, AMEC960302BN, AMEC960303AN, AMEC960402BN, AMEC960403AN, AMEC960603AN, AMEC960603BN, AMEC960803BN, AMEC960804CN, AMEC961004CN, AMEC961005CN, AMEC961205DN, GCEC960403BN, GCEC960603BN, GCEC960803BN, GCEC961005CN, ACEC960403BN, ACEC960603BN, ACEC960803BN, ACEC961005CN |
Where this comes from
Checked against the manufacturer's manual on 9 October 2026.
Other Goodman gas furnace codes
| Code | Meaning | What you can do |
|---|---|---|
| EE8 | High-stage pressure switch closed at start of heating | Call a pro |
| EE9 | High-stage pressure switch not closing | Call a pro |
| EEL | Igniter circuit problem | Call a pro |
| EEn | Igniter open | Call a pro |
| 1 red flash | Ignition failure or gas valve fault (depends on model) | Safe checks first, then a pro |
| 2 red flashes | Pressure switch closed when it should be open | Call a pro |
| 3 red flashes | Pressure switch not closing | Safe checks first, then a pro |
| 3 double red flashes | High-stage pressure switch stuck open | Call a pro |
| 6 red flashes | Overheat / flue or venting fault (depends on model) | Depends on your model |
| 7 red flashes | Flame loss or ignition failure (depends on model) | Depends on your model |
| 8 red flashes | Ignition failure or flame loss (depends on model) | Depends on your model |
| 11 red flashes | Ignition failure or overheat (depends on model) | Call a pro |
See all flue or venting fault codes on gas furnaces across brands.
See all ignition failure codes on gas furnaces across brands.