Performed the level 2 furnace and fireplace cleanings. Furnace: Burners and flame sensor are clean. Heat exchanger looks good. Combustion readings were normal. No CO detected in the air. Drain is clear. High limit passed the safety check. Heat rise was 50°. Unit is heating properly. Fireplace: I wiped down the unit for dust. Inspected and cleaned the logs. Cleaned off the pilot assembly. Cleaned the glass. Cycled the fireplace. Unit is heating properly. I replaced the old thermostat with a new T6 WIFI. Everything is wired, leveled, and set up. I assisted Jerry with setting up the app, connecting the thermostat to the WiFi, and synching the thermostat with the app. Everything is working properly.