Rapid flash
False flame or internal control fault
This code typically points to
- Flame sensed out of sequence
- Board fault
- Flame circuit leakage
Next checks to confirm
- Verify whether actual flame exists
- Inspect flame-sense path and wiring
- Condemn control only after external cause is ruled out
Escalation
Internal control fault if no false-flame cause is found.
Reset behavior
Clears when false-flame condition is resolved.
Safety Critical
Immediate concern