Goodman GMEC960803BN Error Code Red 12 Flashes: Ignitor Relay Failure
What Does Code Red 12 Flashes Mean?
Twelve red flashes on the Goodman GMEC960803BN control board indicate an igniter relay failure. The control board has an internal relay that sends power to the hot surface igniter during the ignition sequence. When this relay fails, the igniter cannot receive power and the furnace cannot light.
This is an internal control board failure, not an igniter problem. The igniter itself may be perfectly functional, but the relay responsible for energizing it has failed. The control board monitors its own relay operation and flags this code when it detects that the relay is not closing as commanded.
There is no field repair for this issue. The control board must be replaced by a qualified HVAC technician. When replacing the control board, the technician should also test the igniter to confirm it was not damaged by any electrical anomaly that may have caused the relay failure.
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Failed igniter relay on control board | Most common | ✗ Call a pro → |
When to Call a Professional
Contact a licensed HVAC technician if:
- The furnace shows 12 red flashes and will not ignite
- The igniter does not glow at all during startup attempts
- A previous repair or power surge may have damaged the control board
✓ Verified against manufacturer service manual — March 2026