Completed 3 system ccm maintenance on 2 gas furnaces and one air handler heat pump i inspected thermostat operations gas and exhaust i did change 2 16x25x1 filters they were good I pulled and cleaned flame sensors cleared pressure tubes inspected low voltage wiring, inspected overall cleanliness of furnace and blower, checked capacitor mfd watched furnace run got inducer and blower amps as well. For air handler I turned to emergency heat checked amps and blower amps, i change the 16x20x1 I checked Freon in heating, checked fan motor amps and capacitor mfd the system Performing normally at this time.