Bertazzoni
Short Circuit / Overcurrent on Startup
Microwave trips the household circuit breaker or blows a fuse when starting a cooking cycle.
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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 magnetron, Damaged power cord, Internal wiring short to chassis
How to Fix / Troubleshooting
Safety first: Do not repeatedly reset the breaker and restart the microwave; this can cause further damage or fire.
- Step 1 – Verify circuit rating: Ensure the microwave is on a dedicated circuit with the correct amperage as specified by Bertazzoni.
- Step 2 – Inspect cord and plug: Unplug the unit and check for burn marks or damage on the plug and cord. Replace if damaged.
- Step 3 – Internal inspection (visual only): With the cover removed and power disconnected, look for burnt wires, melted insulation, or arcing marks, especially near the high-voltage components.
- Step 4 – Professional service: A technician should test the high-voltage capacitor, diode, and magnetron for shorts and repair as needed.
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Repair Difficulty
Professional Required
5/5
Required Part
High-Voltage Capacitor
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