Microwave trips the circuit breaker or blows the house fuse when starting a cook cycle.
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: Repeated breaker tripping indicates a serious electrical fault. Do not continue to reset the breaker and run the microwave.
User-level checks:
- Outlet and circuit: Ensure the microwave is on a dedicated 15–20A circuit and not sharing with other heavy loads.
- Visual inspection: Unplug the unit and inspect the power cord for damage.
Recommended action: Internal shorts in the Frigidaire magnetron, HV capacitor, or noise filter board are likely. A qualified technician should open the unit, test components, and replace the defective part.
Repair Difficulty
Required Part
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