I completed an ac tune-up on a Lennox XP19 heat pumps system. This system is equipped with a 2.5-ton air conditioner and a 2-ton furnace. During the tune-up, I thoroughly inspected and cleaned the indoor and outdoor units, checked the refrigerant levels, adjusted the airflow, and tested the system's performance. I also lubricated all moving parts and made any necessary repairs to ensure optimal efficiency and reliability.