Question about Electric Circuit Breaker Kit for Furnace

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Wiring NO, NC relay on Nordyne furnace

While disassembling NO,NC relays on my Nordyne furnace I failed to mark the black & yellow wires coming from blower. The relays are 20A-10A 240VAC. Is there a web site I could go to for diagrams.

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Posted on Jan 12, 2009


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Posted on Jan 02, 2017


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In order to hook this up to the fan on your furnace, you will need to either have or install a Fan center @ the furnace. (Unless it is gas, and has a circuit board that will simplify the process) All this is, is a transformer, a relay, and a set (or two) of NO and NC contacts. You will need to run 3 wires from the thermostat back to the furnace, if you do not have them already. If you have a gas furnace with a circuit board then all you have to do is connect the three wires from the thermostat to the board. (R to R; W to W; G to G. If you are using an older furnace, or a oil fired appliance, power should go out of the transformer (secondary side) to the thermostat on R. It should then come off W and another wire off G back to the furnace. Connect to the appriately marked terminals on the fan center. Hope this helps

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HVAC Teacher

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