OBH Nordica
Control Panel Sensitivity / Electrical Noise
Microwave randomly starts beeping or flashing without user input.
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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
Moisture on touch panel, Faulty keypad membrane, Electrical noise on control lines, Failing control PCB
How to Fix / Troubleshooting
Safety first: If the microwave starts a cooking cycle by itself, unplug it immediately.
- Step 1 – Clean and dry keypad: Wipe the touch panel with a dry, soft cloth. Ensure no cleaning fluid or moisture is trapped around the edges.
- Step 2 – Observe environment: Strong electromagnetic fields or static discharges can affect sensitive electronics. Move the microwave away from high-power transmitters if applicable.
- Step 3 – Inspect keypad cable: With power disconnected, reseat the ribbon cable between the keypad and control board.
- Step 4 – Replace keypad or PCB: If phantom key presses continue, replace the keypad membrane. If that fails, replace the control PCB.
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Repair Difficulty
Medium
3/5
Required Part
Keypad Membrane / Control PCB
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