Safety: Disconnect power before removing the front panel.

Power reset: Remove power for 5 minutes to clear any firmware lockup, then restore and test buttons.
Inspect keypad area: Check for condensation or water droplets behind the display lens. Dry thoroughly and correct any nearby leaks.
Check ribbon cable: Reseat the ribbon cable between the keypad/display and the main control board.
Replace keypad module: If specific buttons consistently fail, replace the keypad or display module as a unit.

Softener display is on but buttons do not respond or respond intermittently.

Possible Causes