Super tune up performed today on a Daiken heat pump with air handler installed in 2017. All electrical connections are tight with no corrosion. Blower wheel and evaporator coil are clean. Compressor and condenser fan motor are acceptable. Refrigerant levels are in range. Outdoor unit was washed and waxed. Highly recommend adding a compressor saver to the outdoor unit to help with the effigy and reliability of the system.