8 red flashes
Lockout due to too many flame recycles (flame lost five times)
This code typically points to
- Faulty gas valve
- Low gas pressure
- Dirty flame sensor
Next checks to confirm
- Clean flame sensor
- Verify gas pressure under load
- Inspect flame pattern
Escalation
Repeated flame loss indicates combustion instability.
Reset behavior
1-hour lockout then retry.
Urgent
Fix now