Description
The Trane RLY01770 Fan Time Delay Relay is an essential part used to delay blower fan operation after a heating or cooling call in HVAC systems. It is installed inside air handlers or furnace control compartments where it interfaces with the control board and fan circuit. It holds or sequences the fan start or shutdown for a short timed interval to allow the heat exchanger or evaporator coil to reach proper operating conditions. It helps prevent cold air delivery at startup and improves temperature stability, while also allowing post-cycle fan operation to remove heat or cooling from the system.
