Furnace shuts down; status LED shows 10 flashes repeating; blower may run.
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Critical safety warning: A flame rollout condition can indicate a serious combustion or heat exchanger problem that can lead to fire or carbon monoxide hazards. Do not repeatedly reset rollout switches without finding and correcting the cause.
Immediate actions:
- Turn off power and gas to the furnace.
- Allow the furnace to cool completely.
Inspection steps (visual only for homeowners):
- Check around burners: Look for signs of scorching, melted wiring, or soot around the burner compartment and front of the heat exchanger.
- Inspect rollout switches: These are small manual-reset limits near the burners. If a rollout switch has tripped (reset button popped), do not reset until a technician inspects the furnace.
- Check venting: Look for obvious blockages in the flue pipe near the furnace. Do not disassemble venting unless qualified.
Recommendation: Contact a qualified HVAC technician immediately to inspect the heat exchanger, burners, and venting. This fault is not suitable for DIY repair beyond basic visual checks.
Repair Difficulty
Required Part
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