Furnace shuts down quickly after ignition attempt; LED may show rollout-related code; manual reset rollout switch is tripped.
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 tripped rollout switch indicates a potentially dangerous condition (flame leaving the burner area). Do not repeatedly reset without finding the cause. Carbon monoxide and fire risk are serious.
Steps (visual only for homeowners):
- Turn off gas and power immediately.
- Inspect around burners: Look for signs of scorching, melted wiring, or soot around the burner compartment and front panel.
- Check venting: Ensure the flue pipe is intact, properly connected, and not visibly blocked.
- Do not bypass rollout switches: Never jumper or bypass rollout switches for testing.
Because rollout events can indicate a cracked heat exchanger or severe venting problem, contact a licensed HVAC technician immediately for a full combustion and safety inspection. The affected rollout switch can be replaced, but only after the root cause is corrected.
Repair Difficulty
Required Part
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