Performed comprehensive maintenance on a single-zone air conditioning system in Holly Springs, NC. Inspected and cleaned evaporator and condenser coils to optimize heat exchange. Checked refrigerant levels and ensured proper airflow. Lubricated moving parts and tightened electrical connections for efficiency and safety. Conducted thermostat calibration and system testing to confirm peak performance. The system is now primed for reliable cooling throughout the season in Holly Springs, NC.