Salter Short Circuit or Overcurrent on Start-Up

Microwave trips the household circuit breaker or blows a 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, Faulty mains filter or power cord

How to Fix / Troubleshooting

Safety: Repeatedly resetting a breaker without fixing the cause is dangerous. High current faults can cause fire.

Steps:

  • 1. Try another outlet: Plug the Salter microwave into a different circuit (not via an extension lead) to confirm the issue follows the appliance.
  • 2. Observe timing: If the breaker trips immediately when pressing Start, a high-voltage short is likely. Stop using the microwave.
  • 3. Do not bypass protection: Never replace fuses with higher-rated ones or bypass safety devices.
  • 4. Professional repair: A technician must test the high-voltage capacitor, diode, magnetron, and mains filter and replace the faulty component.
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Repair Difficulty

Professional Required 5/5

Required Part

High-Voltage Capacitor
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