I performed a comprehensive maintenance service on an eight-year-old Rheem heat pump package unit. The maintenance began with a thorough inspection of the unit's components, including the compressor, condenser, and evaporator coils. I cleaned the coils and checked for any signs of wear or damage. Next, I inspected and cleaned the air filters, ensuring optimal airflow. I also checked the refrigerant levels and electrical connections, ensuring everything was functioning correctly. Additionally, I lubricated the motor and inspected the thermostat for proper calibration. Finally, I tested the unit to confirm it was operating efficiently and provided recommendations for future maintenance.