Proline
Line Side Short Circuit
Microwave trips the breaker or blows a fuse as soon as it is plugged in, even without pressing any buttons.
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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 line filter (EMI filter) board, Pinched or damaged power cord, Shorted internal wiring at entry point, Faulty main control board
How to Fix / Troubleshooting
Safety first: Unplug the microwave immediately and do not attempt to use it.
User-level checks:
- Inspect the power cord for cuts, crushing, or burn marks.
- Try a different outlet only once to confirm it is not a bad socket.
Next steps:
- The line filter board or internal wiring is likely shorted and must be repaired or replaced by a technician.
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Repair Difficulty
Hard
4/5
Required Part
Line Filter Board
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