A customer in the Streeterville neighborhood of Chicago contacted our team with concerns about an actuator that was not operating properly. A professional diagnostic service was scheduled to evaluate system performance and determine the root cause of the issue. During the visit, our technician performed a comprehensive system inspection, including actuator operation testing, electrical verification, and mechanical component evaluation. Actuators are devices that convert control signals into physical motion, enabling systems to move valves, dampers, and other components that regulate airflow and system performance.