Display works but buttons do not respond or respond only intermittently.

Safety first: Turn off power at the breaker before removing the control panel.

Step-by-step checks:

• Dry panel: If the issue started after cleaning, allow the panel to dry thoroughly. Avoid spraying cleaners directly on the keypad.
• Reseat ribbon cable: Remove the control panel and disconnect/reconnect the keypad ribbon cable to the control board.
• Test specific keys: Note which keys fail. If only certain areas are unresponsive, the membrane is likely worn.

When to replace parts: Replace the touch keypad assembly if separate. If integrated, replace the control panel / UI assembly.