Goodman GMEC960803BN Error Code Red 5 Flashes: Open Rollout / Open Fuse Detect
What Does Code Red 5 Flashes Mean?
Five red flashes on the Goodman GMEC960803BN's Integrated Control Module mean the limit and rollout circuit was open for 15 minutes, indicating an open rollout switch or a blown control-board fuse. The rollout switch is a safety device that trips if flames roll out of the burner box instead of staying inside the heat exchanger — a condition that can push combustion products into the cabinet.
Flame rollout usually points to a serious combustion or venting problem: a blocked heat exchanger or flue, a cracked or plugged heat exchanger, incorrect gas pressure, or misaligned burners causing flames to spill forward. A blown control-board fuse can also produce this code, often as a symptom of a wiring short elsewhere. Because the underlying cause can allow flames or flue gases where they do not belong, this is a high-severity safety fault.
This code is an escalation of the overheat family. Red 4 flashes is a general open limit, and red 11 flashes is a limit open with the inducer running (blower failure). Red 5 specifically flags the rollout/fuse path — the most safety-critical of the group — which is why it must not be reset and rerun without a professional finding the cause.
What You'll Notice
- The furnace is completely shut down and the board flashes red five times
- Soot, scorching, or heat discoloration around the burner area or front panel
- A burning or hot smell near the furnace
- The furnace locked out and will not restart even after cooling
- Signs of a blocked flue or heat exchanger, such as sooting
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Rollout switch tripped due to flame rollout | Most common | ✗ Call a pro → |
| Blown control board fuse | Common | ✗ Call a pro → |
| Restricted airflow or venting | Common | ✗ Call a pro → |
How This Is Diagnosed
Because rollout indicates flames or heat where they should not be, a technician does not simply reset and rerun the furnace. They inspect the burners, heat exchanger, and flue for blockage, cracks, or sooting, verify gas manifold pressure and burner alignment, and check the rollout switch and control-board fuse along with the wiring for a short. The root combustion or venting problem must be corrected before the furnace is returned to service. This is strictly professional work.
When to Call a Professional
This code involves components that are not homeowner-serviceable, so have a licensed HVAC technician diagnose and repair it. Keep in mind:
- The board shows five red flashes at all — this rollout/fuse condition should always be professionally diagnosed
- You see soot, scorching, or discoloration near the burners or front panel
- There is a burning smell or evidence of a blocked flue
- The furnace locks out again after any reset
Frequently Asked Questions
Is it safe to reset five red flashes myself?
No. Five red flashes involve a rollout condition, meaning flames may have escaped the burner area. Repeatedly resetting it can be dangerous. A technician must find and fix the underlying combustion or venting problem first.
What causes flame rollout on this furnace?
Common causes are a blocked or cracked heat exchanger, a restricted flue, incorrect gas pressure, or misaligned burners that let flames spill forward. All require professional inspection.
✓ Verified against manufacturer service manual — March 2026