Two system tune up performed today. Both systems are 10 year old Trane heat pumps with air handlers. All electrical connections are tight with no corrosion. All amp draws are acceptable. Blower wheels and evaporator coils are clean. Refrigerant levels are in range. Compressors and condenser fan motors are acceptable. Both outdoor units were washed and waxed. Pausing job to ensure a return visit is scheduled for Monday to install a 4 ton compressor saver.