2019 Carrier high efficiency furnace running in great condition. 20x25x1 air filter in good condition. Clean flame sensor and check ignitor. Visual inspection of burners. Flush condensation trap and drain lines. 2" pvc flue in good condition and no sign of leaks. 0PPM CO detected during testing in basement. Humidifier pad is new today, damper opened, and test ran solenoid operation. Furnace test ran in heating mode. Delta t of 58F with supply temp of 133F, spec Delta t of 40-70F. All systems are operating properly, efficiently and ready for Winter.