Performed routine maintenance on three air handlers. Inspected and verified the operation of each system, ensuring all components are functioning within manufacturer specifications. Completed a thorough inspection of electrical connections, blower motors, filters, and overall airflow. Sanitized the evaporator coils to enhance efficiency and prevent mold or debris buildup. Additionally, the drain lines were cleaned and treated to ensure proper drainage and prevent blockages. All systems are operating efficiently and in proper working order.