Panasonic Short Circuit or Excessive Inrush Current

Microwave causes the household circuit breaker to trip or blows fuses when starting.

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

Shorted high-voltage capacitor or diode, Shorted magnetron, Faulty line filter or power cord, Internal wiring short to chassis

Safety Warning: Repeatedly resetting a breaker on a shorted appliance is dangerous and can cause fire.

Steps:

Do not retry repeatedly: If the breaker trips immediately when starting the microwave, unplug it and leave it unplugged.
Test outlet: Plug a different appliance into the same outlet to confirm the circuit is otherwise normal.
Check cord: Inspect the microwave's power cord for visible damage.

Next step: Internal high-voltage components or wiring are likely shorted and must be diagnosed and replaced by a qualified technician.

Professional Required 5/5

High-Voltage Capacitor / Diode

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