Thermostat does not respond to touch or buttons, but the display is lit.

Steps:

• Soft reboot: Remove the thermostat from the wall for 30 seconds, then reattach to reboot it.
• Clean screen: Wipe the screen gently with a soft, dry cloth. Do not use liquids that could seep into the edges.
• Check for physical damage: Inspect the glass/plastic for cracks or impact marks that could damage the digitizer.
• Factory reset (if possible): If any buttons still work, perform a factory reset from the settings menu.
• If still unresponsive: The touchscreen assembly or UI controller is likely failed. Replace the thermostat.