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

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

• Step 1 – Remove thermostat: Carefully remove the thermostat from the wall plate and inspect the back for signs of melting, discoloration, or burnt components.
• Step 2 – Inspect wiring: Check the low‑voltage wires for melted insulation or signs of arcing. Ensure no bare wires are touching each other or metal.
• Step 3 – Check transformer output: Have a qualified technician verify that the 24V transformer is providing correct voltage and that there is no overvoltage condition.
• Step 4 – Replace thermostat: Do not reuse a thermostat that has overheated. Install a new iComfort thermostat after correcting any wiring or voltage issues.
• Step 5 – Monitor after replacement: After installing the new thermostat, monitor for any unusual heat or smells during the first few hours of operation.