Titus HVAC 10156901 Fan Relay with a 24 VAC coil is an electrical control component designed to regulate fan motor operation in compatible HVAC systems. It works by using a 24 VAC control signal to open or close electrical contacts, allowing the fan motor to start or stop as required. This relay is commonly used in air handlers, fan coil units, ventilation systems, and other HVAC equi... https://www.partshnc.com/10156901-titus-hvac-titus-fan-relay-24vac-coil