Performed A/C tune-up on an American Standard heat pump system. Checked the electrical, mechanical and performance systems of the unit. Cleared, cleaned, flushed and treated the drain line and cleaned the exterior of the air handler. Replaced the return air filters and washed the outdoor coil. I found the air handler does not have a water safety switch on the secondary pan. The outdoor starter is starting to get pitted at the contacts. The indoor coil is rusted and could have a refrigerant leak in the future. I went over my findings and presented repair options to the homeowner. No other major issues were found. All UV lights are working. The system is operational at completion of service.