Westinghouse
Keypad / Membrane Failure
Microwave keypad buttons are unresponsive or only some keys work 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 membrane keypad,Cracked or oxidized ribbon cable,Moisture intrusion behind keypad,Defective user interface PCB
How to Fix / Troubleshooting
Safety first: Unplug the microwave before removing the control panel.
User-level steps:
- 1. Check for lock mode: Ensure the child lock is not enabled.
- 2. Clean keypad surface: Wipe with a slightly damp cloth and dry thoroughly. Do not spray cleaner directly onto the panel.
Advanced steps:
- 3. Remove control panel: Access the keypad ribbon cable and reseat it on the control board.
- 4. Inspect for corrosion: Look for discoloration or corrosion on the ribbon contacts.
- 5. Replace keypad: If certain keys remain dead, replace the membrane keypad or entire control panel assembly.
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Repair Difficulty
Medium
3/5
Required Part
Membrane Keypad
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