Furnace precision tune up; clean and tune up furnace; clean burners, test ignition components, adjust gas level, test safety circuit, check indoor motors, checked all electrical components, tested indoor air flow, checked heating temperatures, and tested overall furnace operation. Blower Wheel and Air Ducts are getting very dirty. Both are recommended to be cleaned. Will have the office follow up with you in about a week. Duct cleaning is 250$ off right now. Invoice will not show discounted price.