Daewoo High Inrush Current or Short Circuit

Microwave trips the household circuit breaker 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 or diode, Shorted transformer, Faulty line filter, Overloaded household circuit

How to Fix / Troubleshooting

Immediate safety action: If the breaker trips repeatedly, stop using the microwave and unplug it.

User-level checks:

  • 1. Dedicated circuit: Ensure the microwave is on a dedicated circuit with the correct amperage, not shared with other high-load appliances.
  • 2. Try another outlet: If safe and practical, test on a different circuit to rule out house wiring issues.

Technician-level checks:

  • Inspect and test the line filter, transformer, capacitor, and diode for shorts.

Recommendation: Because this involves potential internal shorts, have a qualified technician diagnose and repair.

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Repair Difficulty

Professional Required 5/5

Required Part

High-Voltage Capacitor
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