Princess
Short Circuit or Overcurrent Condition
Microwave trips the household circuit breaker or blows a fuse when starting or during cooking.
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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 high-voltage capacitor, Shorted high-voltage diode, Shorted magnetron, Damaged power cord or internal wiring
How to Fix / Troubleshooting
Safety: Do not repeatedly reset the breaker; this can cause wiring damage or fire.
- Isolate the issue: Plug the microwave into a different dedicated outlet if possible to confirm it's the appliance, not the circuit.
- Visual inspection: Unplug and inspect the power cord for damage. Do not use the unit if the cord is compromised.
- Stop using the microwave: A breaker trip on start strongly suggests an internal short.
- Professional service: A technician should test the high-voltage components and wiring and replace any shorted parts with Princess-approved components.
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Repair Difficulty
Professional Required
5/5
Required Part
High-Voltage Diode
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