Amber flame LED SLOW BLINK
Marginal flame sense
This code typically points to
- Dirty flame sensor
- Improper polarity/phasing
- Poor equipment grounding
- Weak flame carryover
- Incorrect manifold pressure
Next checks to confirm
- Check polarity/phasing and equipment grounding
- Inspect and clean flame rod
- Verify manifold pressure and flame carryover
- Verify wiring continuity between flame rod and IFC
Escalation
Advisory/status until flame signal falls below minimum threshold or contributes to flame-loss/ignition-failure lockout
Reset behavior
Clears automatically when flame signal rises above threshold; lockout reset only if a lockout condition also occurred.
Service Soon
Schedule repair