Dinosaur Electronic TDR Relay replacement Time delay relay is for use in older furnaces that use a standard 12VDC ignitor board. The TDR has a 4 second delay before applying power to the fan motor, and a 2 minute cool down period at the end of the heat cycle before removing power from the fan motor.
TDR (Time Delay Relay)
12 VDC operation Micro controlled
4 second delay2 minute cooldown cycle
Size: 1.5" x 1.5"Potted