Description
The Supco 90341 Switching Fan Relay is an electromechanical component used to switch fan motor circuits based on electrical input signals. It is installed in air handlers, furnaces, and ventilation units where it manages fan activation through thermostat, or control board command. Within HVAC systems, it acts as an interface part that routes 120V signal to fan loads using an internal coil and contact mechanism that opens or closes the circuit depending on demand. This enables structured control of fan operation across residential and light commercial equipment.
