Cooling tune up performed on a Trane heat pump with air handler installed in 2021. All electrical connections are tight with no corrosion on the connections. Some corrosion is present on the inside of the air handler by the blower assembly. ECM blower motor is acceptable and blower wheel and evaporator coil are clean. Upstairs zone damper motor has failed and needs to be changed. Compressor and condenser fan motor are acceptable. Refrigerant levels are in range. Outdoor unit was washed and waxed. Need Aprilaire two wire damper model : 532020 Need to order an IAQ 300 germicidal system Level 1 duct cleaning is scheduled for tomorrow first call. Customer has signed up for the Home and Budget Protection Plan.