Thermostat housing is warm or hot to the touch even when heating is off

Safety first: Turn off power before removing the thermostat from the wall.

Steps to troubleshoot:

• Remove the thermostat and inspect the wall box; ensure there is space for air circulation and no insulation packed tightly behind it.
• Reduce display brightness or set backlight to auto-off in the settings to lower internal heat.
• Verify that the thermostat is not installed above a heat source or in direct sunlight; relocate if necessary.
• If the thermostat remains unusually hot and shows overtemperature errors, replace it; internal components may be failing.