Siemens
Keypad or Touch Control Failure
Microwave display works but buttons or touch controls do not respond or respond intermittently.
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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
Worn keypad membrane, cracked touch glass, loose ribbon cable to control board, liquid ingress into control panel
How to Fix / Troubleshooting
Safety warning: Disconnect power before removing the control panel. Avoid spraying cleaners directly on the panel.
Steps to try:
- 1. Child lock: Check the user manual to ensure the child lock is not activated. Deactivate if necessary.
- 2. Dry the panel: If the panel was recently cleaned or exposed to steam, unplug the microwave and allow it to dry for several hours.
- 3. Test all keys: Note which buttons fail. If entire rows or columns of keys do not work, the keypad membrane or ribbon cable is likely faulty.
- 4. Technician-level: Remove the control panel, reseat the ribbon cable, and if necessary replace the keypad membrane or user interface PCB.
Do not press excessively hard on unresponsive buttons; this can crack the panel.
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Repair Difficulty
Medium
3/5
Required Part
Keypad Membrane / User Interface PCB
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