Tristar
Keypad Wear / Contamination
Buttons are unresponsive or require very hard pressing.
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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 contacts, Coffee or sugar residue under buttons, Loose keypad connector, Cracked touch panel
How to Fix / Troubleshooting
Safety first: Unplug the coffee maker before working on the control panel.
- Clean surface: Wipe the keypad area with a slightly damp cloth and mild detergent, then dry thoroughly.
- Panel removal (advanced): Remove the front cover to access the keypad board. Clean the underside of rubber buttons or membrane with isopropyl alcohol and a lint-free cloth.
- Reseat connector: Ensure the keypad ribbon cable is fully inserted into the main PCB connector.
Note: If the membrane is physically worn or cracked, the entire keypad assembly should be replaced.
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Repair Difficulty
Medium
3/5
Required Part
Keypad / Control Panel Assembly
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