Performed preventative maintenance for gas furnace. Replaced the standard air filter (16x25x1). Inspected all the electrical components. Confirmed proper high and low voltage. Cleaned the burners, flame sensor and burner compartment. Tested the amp draw for the blower and inducer. Blower is operating at 2.8A and inducer is operating at .3A. Performed a combustion analysis on the furnace. System is operating at 83.4% efficiency with a CO level of 19ppm. System is operating properly at this time. No charge due to prepaid maintenance agreement. Model #R801CA075417MSA Serial #W462007846