8 red flashes
Flame lost five times / too many recycles during heating cycle
This code typically points to
- Low gas pressure
- Dirty or faulty flame sensor
- Faulty gas valve
Next checks to confirm
- Measure flame current (normal ~3.7 µA)
- Verify gas pressure under load
- Inspect burner stability and sensor
Escalation
Repeated flame loss indicates combustion instability.
Reset behavior
1-hour lockout then retry.
Urgent
Fix now