Yesterday morning, I responded to a customer's call in Pooler, GA, where the AC unit was not blowing cool air. After performing a thorough inspection, I diagnosed the issue as a result of the Lennox cooling system's 13-year-old age and recommended a repair and annual maintenance tune-up. I cleared the drain lines, inspected the evaporator coils, and added refrigerant. I also replaced the air filters. By completing these maintenance tasks, I helped ensure the AC unit was operating efficiently, reducing the customer's future cooling costs and preparing the unit for the summer season.