Preventative maintenence inspection on 2019 Carrier high efficiency furnace. System is operating in great condition. 20x25x4 air filter in good condition. Clean flame sensor and check ignitor. Visual inspection of burners. Flush condensation trap and drain lines. Humidifier pad in new condition and opened damper. Test run system in heating mode from thermostat. Temperature rise is within specs. Blower and inducer motors tested good. Pvc flue vents in good condition and no sign of leaks. 0PPM CO detected during testing. System is operating properly, efficiently and ready for Winter.