Microwave trips the household breaker or blows a fuse as soon as START is pressed.
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.
Possible Causes
How to Fix / Troubleshooting
Critical safety warning: Repeatedly resetting a tripping breaker can be dangerous. Unplug the microwave and do not attempt further use until the fault is corrected.
User actions:
- Try a different outlet on a dedicated circuit to rule out a weak breaker (do not use extension cords).
- If the breaker still trips immediately when starting, discontinue use.
Technician-level repair:
- Internal diagnosis involves isolating and testing the high-voltage capacitor, diode, magnetron, and wiring for shorts.
- Replace any shorted component with Commercial Chef-compatible parts.
Because of the high risk, this repair should be performed only by qualified technicians.
Repair Difficulty
Required Part
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