What is the primary function of a fan control in a heating system?

A fan control plays a crucial role in managing the operation of the blower within a heating system. The primary function is to start and stop the blower based on the system's operational needs. When the heating system activates, the fan control ensures that the blower begins running to circulate warm air efficiently throughout the space. Conversely, it will stop the blower once the heating demand has been met or when the system is shut down. This operation not only helps maintain a comfortable ambient temperature but also promotes energy efficiency by preventing unnecessary operation of the blower.

While other answers touch on specific aspects of safety and operational functionality, they do not encompass the full breadth of the fan control's primary role purposefully designed to regulate airflow in relation to the heating cycles. The focus on starting and stopping the blower is central to its operation within the heating system.