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Goodman gas furnace code EA2: A2L relay fault on the control board
Gas furnace, Canada and United States
The control board has detected a problem with its internal A2L relay and is running mitigation mode. It stops heating and only the blower runs.
This needs an HVAC technician. There are a few safe checks you can do first, marked below. Anything inside the unit is a job for a professional.
This involves the refrigerant circuit, which only a licensed technician may open.
Only some models show this code. Check the list below.
What causes it
-
A fault in the wiring connected to the ALARM terminal on the control board.
Leave the furnace running while it clears a possible R-32 leakYou can do this
- Leave the furnace powered. In this mode it has stopped the gas heat on purpose and runs its blower at full airflow to dilute any leaked refrigerant. It also switches on a ventilation fan or alarm if one is connected.
- Once the sensor stops detecting refrigerant, the blower keeps running for five more minutes and then the furnace goes back to normal by itself, if there is no other fault.
- Book a licensed HVAC technician to look for a leak at the indoor coil and to check the R-32 sensor and its wiring.
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If the code stays after the alarm wiring is disconnected and the power is cycled, the control board is replaced.
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 an HVAC technician
Book a licensed air conditioning technicianHVAC technician
- Do not open any panels. Refrigerant circuits must only be opened by a licensed technician.
- Note the code, which unit shows it (indoor or outdoor), and the model numbers of both units.
- Book a licensed air conditioning technician and give them those details.
Models that show this code
29 models in 3 ranges
| Range | Models |
|---|---|
| GRVM97 / GDVM97 | GRVM970603BN, GRVM970803BN, GRVM970804CN, GRVM971005CN, GRVM971205DN |
| GRVT80 / GDVT80 | GRVT800603BN, GRVT800603BX, GRVT800604BN, GRVT800604BX, GRVT800803BN, GRVT800804CN, GRVT800804CX, GRVT800805CN, GRVT800805CX, GRVT800805DN, GRVT800805DX, GRVT801005CN, GRVT801005CX, GDVT800603BX, GDVT800803BX, GDVT800805CX, GDVT801005CX |
| GRVT96 / GDVT96 | GRVT960403BN, GRVT960603BN, GRVT960803BN, GRVT960804CN, GRVT961005CN, GRVT961005DN, GRVT961205DN |
Where this comes from
- GRVT80/GDVT80 gas furnace installation instructions (IOG-2043B) , page 37
- GRVT96/GDVT96 gas furnace installation instructions (IOG-2044A) , page 53
- 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 |
|---|---|---|
| E17 | Supply air sensor circuit open | Call a pro |
| E18 | Supply air sensor circuit shorted | Call a pro |
| E19 | Onboard return air sensor unplugged | Call a pro |
| EA | Reversed polarity or poor ground | Call a pro |
| EA0 | R-32 refrigerant leak detected | Safe checks first, then a pro |
| EA1 | R-32 refrigerant sensor fault | Safe checks first, then a pro |
| EAF | Lost communication with the R-32 refrigerant sensor | Safe checks first, then a pro |
| EAL | R-32 refrigerant leak detected | Safe checks first, then a pro |
| EAr | A2L relay fault on the control board | Safe checks first, then a pro |
| EAS | R-32 refrigerant sensor fault | Safe checks first, then a pro |
| Eb0 | Circulator blower motor not running | Call a pro |
| Eb1 | Lost communication with the circulator blower motor | Call a pro |
See all refrigerant fault codes on gas furnaces across brands.