Severin
Short Circuit / Overcurrent on Startup
Microwave trips the household circuit breaker or blows fuses when starting.
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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 or diode, Shorted mains filter, Damaged power cord, Internal wiring short to chassis
How to Fix / Troubleshooting
Safety first: Unplug the microwave. Repeated tripping indicates a serious fault; avoid repeated resets.
- Step 1 – Try another outlet: Plug into a different dedicated circuit to rule out a weak breaker (do not use extension cords).
- Step 2 – Visual inspection: Remove the cabinet and inspect mains filter board and wiring for burn marks or melted insulation.
- Step 3 – Do not touch HV parts: High-voltage capacitor and diode testing must be done by a professional due to shock risk.
- Step 4 – Professional service: Arrange for a technician to test the HV capacitor, diode, and mains filter and replace any shorted components.
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Repair Difficulty
Professional Required
5/5
Required Part
Mains Filter Board
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