I recently completed an AC tuneup on a York air-conditioning system. The first step was to inspect the system and visually check the coils, blower wheel, and other components for any signs of wear or damage. Next, I tested the electrical connections and refrigerant levels. I also adjusted the airflow and tested the thermostat to ensure optimal performance. Finally, I cleaned the condenser coil and made any necessary repairs to ensure the system is running efficiently and safely.