What is one of the key functions of a fan/limit control?

One of the key functions of a fan/limit control is to switch the blower motor on and off based on temperature. This component plays a crucial role in maintaining the desired temperature within the space being conditioned. When the temperature inside the furnace reaches a predetermined limit, the fan/limit control activates the blower motor, allowing it to circulate air through the system and distribute the heated or cooled air throughout the home. Once the temperature drops below a certain point, the fan/limit control will turn the blower motor off to conserve energy and prevent the system from running unnecessarily.

This control mechanism is integral to the efficiency and effectiveness of heating and cooling systems, ensuring that air circulation is optimized in relation to the system's operation. Proper function of the fan/limit control helps maintain comfort levels in the home while also aiding in energy efficiency by preventing the blower from running when it is not needed.