A127_F
Flame present with gas valve off - UL (safety supervision)
This code typically points to
- UL-supervised flame-presence abnormality during valve-off condition
Next checks to confirm
- Verify valve command and flame-sense state
Escalation
Safety-related abnormal flame supervision
Reset behavior
Clears when supervised condition is corrected; may require power/heat-call reset.
Safety Critical
Immediate concern