Thermostat emits a burning smell or feels unusually hot to the touch

Safety: Immediately turn OFF power to the HVAC system at the breaker. Do not continue using a thermostat that smells like burning or is excessively hot.

• Inspect surroundings: Ensure the thermostat is not installed on a wall that contains a chimney, flue, or hot water pipe directly behind it.
• Remove thermostat: Carefully remove the thermostat from the wall plate and inspect the back for burnt components, melted plastic, or discoloration.
• Do not reuse: If any signs of overheating are present, do not reinstall or power the thermostat. It must be replaced.
• Check load wiring: Have a technician verify that high-current loads (e.g., humidifiers, dehumidifiers) are not being powered directly through the thermostat beyond its rating; they should use relays.
• Install replacement correctly: When installing a new Ruud thermostat, ensure proper wiring and that it is mounted on a suitable wall surface away from heat sources.