Heater display is on but unit does not respond to button presses

Safety: Turn off power before removing the control panel cover.

• Dry the panel: If the heater is outdoors and recently exposed to heavy rain or splashing, allow the control panel to dry. Use a dry cloth and protect it from further water exposure.
• Inspect ribbon cable: Remove the front bezel and check the flat ribbon cable between the Display/Keypad Board and the main control board. Reseat both ends.
• Look for corrosion: Examine the keypad area for signs of water ingress or corrosion. If the overlay is cracked or peeling, replace the entire display/keypad assembly.
• Test with remote (if available): If you have an external controller, see if you can operate the heater remotely. If remote control works but local keypad does not, the keypad board is faulty.