Buttons respond intermittently; sometimes require very hard presses.

Safety first: Unplug the unit before working on the control panel.

Steps:

• 1. Clean surface: Wipe the keypad with a slightly damp cloth to remove grease and dirt.
• 2. Dry thoroughly: If moisture has entered, allow the panel to dry for several hours.
• 3. Reseat cable: Open the control panel and reseat the keypad ribbon cable.
• 4. Replace keypad: If buttons still require excessive force or fail intermittently, replace the keypad/control panel assembly.