Carrier HR54AA105 Fan Cycling Switch

The Carrier HR54AA105 Fan Cycling Switch is an element in Carrier HVAC systems, including air conditioners or furnaces, sized 1.18”L x 1.25”W x 1.5”H. This switch also tests the system temperature and whether the fan is working or not. According to these criteria, it regulates the cycling of the fan on and off. This may turn on the fan when the system is cool after reaching the set temperature, to circulate the cool air all over the house. It may shut down the fan during the heating cycles when the furnace is in the process of heating the house.