Preformed heating maintenance on heat pump system. Confirmed filters were clean and the thermostat is working properly. Checked electric heat strips and found amp draw within manufacturer specs 40.4 Took amp draw on blower motor and found within spec .94 Confirmed all high and low voltage was good and tight. Found blower wheel with slight build up, cleaned per contract. Evaporator coil is leak free and clean of any debris at this time. Cleared main drain and confirmed safety switches working properly. Took amp draw on the compressor and found within manufacturer spec 15.4 Checked amp draw on condenser fan motor and found within spec .62 Checked refrigerant levels and found within spec using heat curve chart 110/410 put system into defrost and found operating properly at this time. Returned to service