Performed heater tune-up on a Carrier 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 air filter for the air handler and fresh air system with a client supplied filter. Sealed some air straws on the air handler. Secured the outdoor compressor wiring and washed the outdoor coil. No major issues were found. The system is operational at this time.