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

Safety first: Immediately turn off power to the furnace/air handler at the breaker and do not continue using the thermostat if you smell burning or feel excessive heat.

Steps to address overheating thermostat:

• 1. Cut power: Turn off the HVAC breakers and any service switches feeding the thermostat.
• 2. Remove thermostat: Carefully remove the thermostat from the wall sub-base and inspect the back for burn marks or melted plastic.
• 3. Inspect wiring: Check for miswired terminals (e.g., line voltage mistakenly connected to low-voltage terminals) and correct immediately. This may require a professional.
• 4. Do not reuse damaged unit: If there is any sign of melting, charring, or strong burnt odor, do not reinstall the thermostat.
• 5. Replace thermostat and verify wiring: Install a new Goodman-compatible smart thermostat, carefully matching each low-voltage conductor to the correct terminal per the Goodman furnace/air handler wiring diagram.
• 6. Have system inspected: Consider having a licensed HVAC technician inspect the Goodman equipment and wiring for any related damage.