Amana AMSS920803BN Error Code 5 Flashes: Flame Sensed With No Call for Heat
What Does Code 5 Flashes Mean?
Code 5 (5 Flashes) on the Amana AMSS920803BN means the control module is sensing a flame signal even though it has not called for heat. This is a serious safety condition. Both the induced draft blower and the circulation blower will run continuously as a protective measure to ventilate any combustion gases.
The most common cause is a short to ground in the flame sensor wiring. The flame sensor works by sending a tiny electrical current through the flame — if the wiring is damaged or shorted, the control board receives a false signal that mimics a flame being present. This electrical fault can occur from worn insulation, a pinched wire, or moisture contacting the wiring.
Because this code involves the furnace detecting combustion when none should be occurring, it should be treated as an urgent safety issue. Turn off power to the furnace at the circuit breaker and do not attempt to diagnose or repair this yourself. A qualified HVAC technician needs to inspect the flame sensor circuit, check for wiring damage, and verify that no actual gas leak exists.
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Short to ground in flame sensor wiring | Most common | ✗ Call a pro → |
When to Call a Professional
Contact a licensed HVAC technician if:
- Immediately — this code indicates a safety-critical condition requiring professional diagnosis
- Both the inducer and blower are running continuously with no call for heat
✓ Verified against manufacturer service manual — March 2026