Ikea Short Circuit Under Load

Microwave trips the house breaker or blows a fuse as soon as it starts or within a few seconds.

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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 magnetron, Shorted power cord or line filter, Faulty high-voltage transformer

How to Fix / Troubleshooting

Danger: Repeatedly resetting a breaker on a shorted microwave is hazardous. Stop using the appliance until it is repaired.

User actions:

  • 1. Confirm the issue: Try another high-load appliance on the same outlet to ensure the circuit itself is not undersized.
  • 2. Do not bypass safety devices: Never replace a breaker or fuse with a higher rating.

Technician actions:

  • Inspect the HV capacitor, magnetron, and transformer for shorts.
  • Check the line filter and power cord for insulation damage.

Resolution: Replace the shorted component(s) with IKEA-compatible parts. Do not operate the microwave until the fault is corrected.

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Repair Difficulty

Professional Required 5/5

Required Part

High-Voltage Capacitor
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