Trane heat pump with air handler installed in 2019. All electrical connections are tight with no corrosion. Ecm blower motor is acceptable. Blower wheel and evaporator coil are clean. Heat strips are pulling proper amperage. Compressor and condenser fan motor are acceptable. No drain protection or surge protection has been installed. Gave estimates to install both. Refrigerant levels are in range. Outdoor unit was washed and waxed to help prevent sun damage.