Goodman GMEC960803BN Error Code Red 11 Flashes: Limit Switch Open - Blower Failure
What Does Code Red 11 Flashes Mean?
Eleven red flashes on the Goodman GMEC960803BN control board indicate that the limit switch circuit has been open for more than 5 minutes. The inducer motor continues running, but the furnace has determined that the indoor blower is not functioning properly and has shut down the heating operation.
The limit switch opens when the furnace overheats, which normally happens because the blower motor is not moving enough air across the heat exchanger. When this condition persists for over 5 minutes, the control board interprets it as a blower failure rather than a temporary airflow restriction. This distinguishes it from a standard limit switch trip (code red-4), which clears once the heat exchanger cools down.
The primary cause is a failed or failing indoor blower motor — the motor may have seized, lost a capacitor, or developed a winding fault. A broken blower wheel, a disconnected blower wire, or a failed blower relay on the control board can also produce this code. Unlike a dirty filter situation, this code indicates the blower itself is the problem, not the airflow path.
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Indoor blower motor failure | Most common | ✗ Call a pro → |
| Limit switch stuck open due to overheating | Common | ✗ Call a pro → |
When to Call a Professional
Contact a licensed HVAC technician if:
- The furnace shows 11 red flashes and the blower is not spinning
- The blower motor hums but does not rotate
- The blower runs but at very low speed
✓ Verified against manufacturer service manual — March 2026