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. Humidifier precision tune up and cleaning. Remove current water pad, clean off pad housing and water distributor. Clean out humidifier box. Clear out drain line. Replace with new water pad. Air Exchanger and tune up. Remove filters and core to vacuum. Also clean cabinet interior. Inspect bearings on blower assembly. Install core and filters. Clean off outside hoods. Test operation of air exchanger.