Performed semiannual maintenance on one heat pump cooling system. Inspected all performance, mechanical, and safety systems. Tested and verified everything was operating within manufacturer specifications for operation. The homeowner just changed his air filter out prior to us coming out. Flushed and treated the primary condensate line and verified all condensate was properly draining. Refrigerant levels were within range for cooling of the house. Everything is working at this time. I did reset the thermostat back to original setpoint temperature per homeowner's request.