Amana AMSS960803BN Error Code 5 Flashes: Flame Sensed With No Call for Heat
What Does Code 5 Flashes Mean?
Code 5 (5 Flashes) on the Amana AMSS960803BN indicates that the control module is sensing a flame signal when the furnace has not initiated a heating cycle. As a safety response, the induced draft blower and circulation blower will both run continuously to ventilate any potential combustion byproducts.
This condition is almost always caused by a short to ground in the flame sensor wiring circuit. The flame sensor detects combustion by passing a microamp-level electrical current through the flame. If the insulation on the flame sensor wire is damaged, or if the wire contacts a grounded metal surface, the control board receives a signal that mimics the presence of flame even when none exists.
This is considered a safety-critical fault because the furnace cannot distinguish between a real flame and a false signal. You should turn off power to the furnace at the circuit breaker and have a qualified HVAC technician inspect the flame sensor, its wiring, and the control board. Do not attempt to bypass or repair this yourself.
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 potential safety hazard that requires professional inspection
- The inducer and blower are running nonstop without the thermostat calling for heat
Sources
✓ Verified against manufacturer service manual — March 2026