E9
Bauknecht
Low Voltage / Power Supply Error
Microwave shows E9; clock and display may behave erratically.
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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
Unstable mains voltage, Internal low-voltage power supply failure on control board, Loose power connector, Faulty line filter
How to Fix / Troubleshooting
Safety first: Unplug the unit before any internal inspection.
- Step 1 – Check outlet: Plug another appliance into the same outlet to verify stable power. Avoid using extension cords.
- Step 2 – Power reset: Unplug for 10 minutes, reconnect directly to a wall socket, and test.
- Step 3 – Inspect power cord: Check for cuts, burns, or kinks. Replace if damaged.
- Step 4 – Professional diagnosis: If E9 persists, a technician should test the line filter, internal power supply circuit, and control board. Replace the main control board if the low-voltage supply is unstable.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board
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