Bomann
Power Interruption / Internal Power Supply Instability
Microwave stops mid-cycle and resets, losing the clock and program settings.
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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
Loose power cord connection, Faulty mains filter or line cord, Failing low-voltage power supply on control PCB, Overheating causing thermal cut-out
How to Fix / Troubleshooting
Safety: Unplug the microwave before internal inspection.
- Step 1 – Check outlet and plug: Ensure the plug fits firmly in the outlet and that the outlet is not loose. Avoid using extension cords.
- Step 2 – Inspect power cord: Look for kinks, cuts, or burn marks. Replace a damaged cord.
- Step 3 – Internal connections: With the cabinet removed, check the mains filter, line connectors, and wiring to the control PCB for looseness or overheating.
- Step 4 – Control PCB power supply: If all connections are good, the low-voltage power supply on the control board may be unstable and require board replacement.
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Repair Difficulty
Medium
3/5
Required Part
Mains Filter / Power Cord
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