Heater display is on but does not respond to button presses; cannot change temperature or mode.

Safety First: Turn off power before removing the front control panel.

• Dry the panel: If the panel is wet from rain or splashing, allow it to dry completely. Do not use the heater until the panel is dry.
• Inspect ribbon cable: Remove the front bezel and check the flat cable between the keypad and display/control board. Reseat both ends.
• Check for lockout: Some models allow locking the keypad. Refer to the manual to unlock if a lock icon is shown.
• Replace keypad: If buttons still do not respond, the keypad membrane may need replacement as a complete front panel assembly.