Teka
Short Circuit / Earth Leakage Under Load
Microwave trips the household circuit breaker or RCD as soon as START is pressed.
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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,Pinched or damaged internal wiring
How to Fix / Troubleshooting
Safety: Do not repeatedly reset the breaker and retry; this can cause further damage or fire.
User actions:
- Disconnect the microwave and try another appliance on the same outlet to confirm the circuit is sound.
- If only the microwave causes tripping, discontinue use.
Technician actions:
- Inspect internal wiring for burns or pinched insulation.
- Test the high-voltage components (capacitor, diode, magnetron) for shorts.
- Replace any shorted component and verify insulation resistance to earth.
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Repair Difficulty
Professional Required
5/5
Required Part
High-Voltage Capacitor
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