Russell Hobbs Short Circuit or Overcurrent on Startup

Microwave trips the household circuit breaker or blows fuse 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,Shorted high-voltage diode,Shorted magnetron,Shorted mains filter or wiring

How to Fix / Troubleshooting

Critical safety warning: Repeatedly resetting breakers can be dangerous. High-voltage components may be shorted.

  • 1. Do not keep retrying: If the breaker trips immediately when you press Start, stop using the microwave.
  • 2. Basic external check: Inspect the mains cable and plug for visible damage or signs of overheating.
  • 3. Different outlet test (if safe): If possible, test on a different circuit to rule out a weak breaker, but only once. If it trips again, discontinue use.
  • 4. Professional diagnosis: A technician will test the HV capacitor, diode, magnetron, and mains filter for shorts and replace the defective component.
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Repair Difficulty

Professional Required 5/5

Required Part

High Voltage Capacitor
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