Thermostat displays E11 and may not respond to touch or may freeze intermittently.

Safety first: Only remove the thermostat from the wall plate; do not open the sealed housing.

• Step 1 – Power cycle: Remove the thermostat from the wall plate for 1–2 minutes, then reinstall. This reboots the internal electronics.
• Step 2 – Clean screen: Wipe the screen gently with a soft, dry cloth to remove oils or debris that might affect touch sensitivity.
• Step 3 – Firmware update: If accessible, check the thermostat settings for a firmware update option and apply any available updates.
• Step 4 – Factory reset: If the screen is still partially responsive, perform a factory reset from the settings menu. Reconfigure the thermostat afterward.
• Step 5 – Replace thermostat: If the touchscreen is unresponsive or E11 persists, the internal display/digitizer assembly is likely failed and the thermostat must be replaced.
• When to call a pro: A technician can confirm that the issue is not with the HVAC equipment before you invest in a replacement thermostat.