I recently performed a comprehensive service on a three-year-old Lennox package heat pump. The service began with a thorough inspection of the unit's components, including the air handler, condenser, and heat exchanger. I cleaned the coils and filters, ensuring optimal airflow and efficiency. I also checked and adjusted the thermostat settings and calibrated the system for peak performance. Additionally, I inspected the electrical connections and refrigerant levels, making necessary adjustments. The service concluded with a detailed review of the system's operation and a final test run to confirm everything was functioning correctly.