Microwave trips the home circuit breaker or blows a fuse when starting or a few seconds into cooking.
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
Safety: Repeatedly resetting a tripping breaker can be dangerous. Do not continue to use the microwave until the cause is identified.
- Isolate the issue: Plug the microwave into a dedicated outlet with no other high-load devices. If the breaker still trips immediately when starting, the fault is inside the microwave.
- Inspect cord and plug: With the unit unplugged, check for cuts, melted areas, or exposed wires on the cord and plug.
- Do not attempt internal repair: Shorted high-voltage components are hazardous and require specialized tools.
Next step: Leave the microwave unplugged and arrange service with a Bosch technician to test the magnetron, capacitor, and internal wiring.
Repair Difficulty
Required Part
We may earn a commission from links on this page.