RCA Short Circuit or Overcurrent Condition

Microwave trips the household circuit breaker or blows a fuse 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, Shorted magnetron, Shorted power cord, Faulty line filter or noise suppression board

Safety Warning: Repeated breaker tripping indicates a potentially dangerous short. Do not continue resetting and using the microwave.

Checks:

1. Try another outlet: Plug the microwave into a different dedicated circuit (if available) to rule out a weak breaker. Do not use extension cords.
2. Observe timing: If the breaker trips immediately when START is pressed, a high-voltage short is likely.

Internal shorts in the high-voltage system or line filter require professional service. Unplug the unit and arrange for inspection and repair.

Professional Required 5/5

High-Voltage Capacitor

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