Nest thermostat is hot to the touch or feels unusually warm

Safety: Overheating can damage electronics but is usually not a fire hazard at low voltage. If the thermostat smells burnt, turn off HVAC power immediately.

• Check location: Ensure the Nest is not in direct sunlight, above a radiator, or on a wall with hot plumbing or ductwork behind it.
• Adjust display settings: Reduce display brightness and disable always‑on features in the Nest settings.
• Inspect wall cavity: Remove the Nest and feel inside the wall opening for hot air leaks from ducts. Seal gaps with appropriate materials.
• Monitor operation: After changes, monitor temperature and behavior. If the thermostat remains excessively hot or malfunctions, the internal electronics may be failing.
• Replace thermostat: A Nest that consistently overheats despite proper installation should be replaced.