Hello,

I need help!! I have a White-Rodgers/Steveco 90113 Fan Control Center with a SPDT relay. I need to know how to wire it, I have a thermostate with the red and green wires running to the fan control center, all I need to do is run a single stage fan on my Ducane furnace so the blower will kick on to heat my home from my outdoor wood boiler. The fan control center has a BLACK, RED and Brown Wire coming from it, when I hooked the 110 power into the transformer and the Red thermostat wire to ""R" and the Greeg thermostat wire to the "G" and the thermostat clicked the transformer but I have no power to run the fan on the red, black or brown wire coming from the relay? Please help I need heat.

You need to be more precise on your terms, tell us about the motor where are the wires to it connected.
I would think that the only function of the SPDT relay would be is to power the motor.

You are correct, I need to power up my fan that is already in my ducane furnace, I had done this previousley but the relay went bad and I forgot how I wired it, Basically I need to connect the fan control center to the thermostat for heat only and need to know what single wire I need to hook to the motor for positive power since it is already grounded at the furnace

Sounds like you are controlling the relay but not switching the load. Remember that the relay is just an electrically operated switch. If the relay is working, then you need to make sure that the energized relay closes the contacts which the fan is connected to.

Everything you need to know is right below.

http://www.white-rodgers.com/wrdhom/pdfs/instruction_sheets/0037-5786.pdf