Error Code 5 FLASHES
Goodman GMSS960803BN Error Code 5 FLASHES: Flame sensed when no flame should be present (no call for heat)
TL;DR
Flame sensed when no flame should be present (no call for heat) Disclaimer
This article is for informational purposes only and does not guarantee the accuracy or completeness of the information provided. Always turn off power and gas supply before attempting any repairs. If you smell gas, leave immediately and call your gas company. Consult a licensed HVAC technician for diagnosis and repair. Any actions taken based on this information are at your own risk. What Does Code 5 FLASHES Mean?
Flame sensed when no flame should be present (no call for heat)
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Short to ground in flame sense circuit | Most common | ✗ Call a pro → |
| Gas valve leaking through | Common | ✗ Call a pro → |
When to Call a Professional
Contact a licensed HVAC technician if:
- Basic troubleshooting did not resolve the error
- You smell gas at any point during the process
- You are not comfortable working around gas lines or electrical components
- The unit needs a gas valve, control board, or motor replacement