Arctic King
Overheating Electrical Component
Burning or electrical smell when the unit is operating.
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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
Dust burning off heating elements (heat models), Overheating motor windings, Loose electrical connection arcing, Failing main control board component
How to Fix / Troubleshooting
Safety: Immediately turn off and unplug the unit if you smell burning. Do not continue to operate until inspected.
Steps to investigate burning smell:
- Visual inspection: After the unit cools, remove covers and inspect the main PCB, motors, and wiring for burn marks, melted insulation, or discoloration.
- Check connections: Tighten any loose spade connectors or screws on terminal blocks. Replace any burnt connectors and the associated wiring harness.
- Motor check: Smell near the indoor and outdoor motors. If one smells burnt or shows discoloration, replace the blower motor or condenser fan motor.
- Board replacement: If the smell originates from the control board and components appear burnt, replace the main control board.
- Test carefully: After repairs, run the unit under supervision. If any burning smell returns, shut down and seek professional service.
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Repair Difficulty
Hard
4/5
Required Part
Wiring Harness
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