Safety: Unplug the unit before accessing the control panel.

Steps:

1. Clean panel surface: Wipe the touch panel with a soft, dry cloth to remove oils and moisture.
2. Power reset: Unplug for 5–10 minutes, then plug back in to clear any temporary logic issue.
3. Access keypad PCB: Remove the trim around the control panel and carefully pull out the touch PCB.
4. Reseat ribbon cable: Disconnect and reconnect the cable between the touch PCB and main board.
5. Inspect for damage: Look for cracks or burn marks on the keypad PCB. Replace if damaged.
6. Replace main board: If a new keypad does not restore function, the main control board may be faulty.

Buttons on the control panel do not respond or respond intermittently.

Possible Causes