Nobel
Keypad / User Interface Fault
Softener display works but buttons do not respond or respond intermittently
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Possible Causes
Moisture under keypad, Worn membrane switches, Loose ribbon cable to control board, Contaminated button contacts
How to Fix / Troubleshooting
Safety first: Unplug the unit before opening the control panel.
- Inspect keypad surface: Check for signs of water ingress or cleaning fluid residue. Dry the surface and avoid spraying cleaners directly on the panel.
- Check ribbon cable: Remove the cover and reseat the ribbon cable between the keypad/display and the main board.
- Dry moisture: If condensation is present inside the housing, dry gently with a hair dryer on low heat and improve ventilation around the unit.
- Test buttons: After reassembly, plug in and test each button. If some remain unresponsive, the keypad assembly may need replacement.
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Repair Difficulty
Easy
2/5
Required Part
Keypad / Display Module
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