Keystone
Overcurrent / Electrical Short
Keystone air conditioner trips the household circuit breaker or blows fuses when starting or 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
Shorted compressor, shorted fan motor, damaged power cord, incorrect circuit size, failed capacitor causing high inrush current
How to Fix / Troubleshooting
Warning: Repeated breaker tripping indicates a serious electrical issue. Do not keep resetting the breaker without inspection.
Steps:
- Verify circuit: Ensure the AC is on a dedicated circuit with the correct amperage as specified on the nameplate.
- Inspect cord and plug: Look for burns or melted areas. Replace the cord set if damaged.
- Check capacitor and motors: A failed capacitor or motor can cause high current draw. Test and replace suspect components.
- Professional diagnosis: If the compressor windings are shorted to ground or between terminals, the compressor and sealed system will require professional replacement.
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Repair Difficulty
Professional Required
5/5
Required Part
Compressor or Fan Motor
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