Keystone
Overheating Electrical Component
Keystone air conditioner emits a burning or electrical smell during operation.
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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
Overheating fan motor, failing compressor, burnt wiring or connectors, failing capacitor or control board component
How to Fix / Troubleshooting
Warning: A burning smell can indicate fire risk. Turn off and unplug the unit immediately.
Steps:
- Do not continue operation: Leave the unit unplugged until inspected.
- Visual inspection: Remove the front and rear covers and look for burnt wires, melted insulation, or scorched PCB areas.
- Check motors and capacitor: Smell near the fan motors and capacitor. Replace any component that shows signs of overheating or bulging.
- Repair wiring: Replace any discolored or brittle wiring harness sections with proper gauge wire and connectors.
- Professional service: If the source cannot be clearly identified and corrected, have a qualified technician inspect the unit before reuse.
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Repair Difficulty
Hard
4/5
Required Part
Wiring Harness or Fan Motor
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