Performed preventative maintenance for high efficiency furnace. Cleaned the burners, flame sensor and burner compartment. Inspected all the electrical components. Customer replaced the Merv 11 air filter. Confirmed proper high and low voltages. Tested the amp draw for the blower and inducer. Both are operating within the manufacturer specs. Made sure all tubing was clear from the pressure switch and collector box. This furnace runs on LP gas. Performed a humidifier service on an Aprilaire bypass humidifier. Replaced the #35 water panel. Performed a combustion analysis on the furnace. System is operating at 95.3% efficiency with a CO level of 22ppm. System is operating properly at this time. Model #G32V5-125-5 Serial #5803G53601