Today, I was out in Youngtown, AZ, performing a comprehensive tune-up on a Trane air conditioner. I started by checking the refrigerant levels to ensure optimal cooling efficiency. I then cleaned the condenser coils, which can accumulate dirt and reduce system effectiveness. I inspected the electrical connections for safety and tightened them as necessary. The filters were replaced to maintain air quality and flow. Lastly, I calibrated the thermostat and ran a cycle test to make sure everything was operating smoothly. The system is now ready to handle the Arizona heat with improved performance and reliability.