Thermostat or surrounding wall feels unusually warm to the touch

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

• Inspect wall opening: Remove the thermostat and check for large gaps in the wall behind it. Warm air from wall cavities can heat the thermostat.
• Seal gaps: Use non‑flammable insulation or foam to seal around the low‑voltage cable opening, avoiding contact with the wires.
• Install wall plate insulation: Some Honeywell Home thermostats include an insulating foam gasket; install it between the thermostat and wall.
• Relocate thermostat if necessary: If mounted on a hot exterior wall or above a heat source, consider relocating to an interior wall for more accurate readings.