Rapid amber flash
Low flame-sense current
This code typically points to
- Dirty flame rod
- Weak flame
- Grounding issue
- Flame sensor wiring fault
Next checks to confirm
- Clean flame rod and measure current (normal ~3.7 µA)
- Verify burner carryover
- Verify grounding
Escalation
Warning at 1.5 µA, lockout at 0.1 µA.
Reset behavior
Status indicator during operation.
Service Soon
Schedule repair