34
Ignition-proving fault
This code typically points to
- Poor flame-sense current
- Gas valve not opening correctly
- Gas supply issue
- Rough ignition / poor carryover
- Grounding problem
Next checks to confirm
- Measure flame current in µA
- Check sensor, ground path, burner carryover, gas pressure
- Verify gas valve operation and inlet pressure
Escalation
Repeated flame loss after successful ignition can point to rollout/combustion instability or board/flame-rectification issue.
Reset behavior
Control retries three more times before lockout 14.
Urgent
Fix now