Kelvinator
Early Flame Failure or Safety Trip
Furnace starts but shuts down within 30 seconds without obvious error code
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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.
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Possible Causes
Dirty flame sensor, Loose burner ground, Intermittent pressure switch operation, Weak hot surface ignitor
How to Fix / Troubleshooting
Safety first: Turn OFF power and gas before servicing burners or sensors.
- Clean flame sensor: Remove and gently clean the sensor rod with fine steel wool. Reinstall securely.
- Check ground wire: Verify the ground wire from the control board to the furnace chassis is tight and free of rust.
- Inspect pressure tubing: Ensure the pressure switch tubing is not kinked or partially blocked with water.
- Observe sequence: Restore power and gas, call for heat, and watch the sequence. If burners light then go out quickly, a technician may need to measure flame signal and replace the sensor or board.
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Repair Difficulty
Medium
3/5
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