Performed A/C tune-up on two Carrier heat pump systems. Checked the electrical, mechanical and performance systems of the unit. I replaced the return air filters with client supplied filters. Cleared, cleaned, flushed and treated the drain lines and cleaned the exterior of the air handlers. Verified the compressor wiring is secure and washed both outdoor coils. No issues were found. All surge protection devices and UV lights are working. Both systems are operational at this time.