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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  • 359 Answers

NORDYNE , GOODMAN, AND NUTONE ARE ALL BUILT BY SAME MFG SO IF YOU TRY ALL THESE MAYBE YOU CAN FIND THE HELP YOU NEED

Posted on Jan 12, 2009

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Posted on Jan 02, 2017

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Furnace fan will not stop running till you pull out fuse


Most likely the fan relay is defective or the electric heater is defective. If the fan will not turn off, the cause is generally the electric heat is being back feed from a defective heat strip., Recommend call pro. If so inclined, remove power, breaker etc find 1/4or 5/16 driver and Remove panel from the ah. Look for the fan and follow the wires back to the relay( this is usually black,for high speed, blue for.med and red for low ) Follow the fan speed tap to the relay. If the relay is burnt or looks defective replace this part. If no defect is obvious remove the wire from the NC (normally closed) connection. Plug the power and check to see if the fan starts with out command. If the fan starts it definitely the relay. Note the wire removed from NC might be hot check with meter if it is and the electric heat is signalling the fan to run and most likely source of defect is the heat sequencers, (switch relays for high voltages) replace this part

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Need Wiring diagram for Nordyne MGHA-070ABFC-02 GAS FURNACE


I replaced the thermostat on the wall now my a.c. runs continuously. The relay switch on the furnace needs to be reset. Any help?? I have to manually shut

Aug 23, 2014 | Heating & Cooling

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I WANT TO HOOK IT UP TO A FAN,BUT ARE NOT SURE WHICH CONNECTIONS TO ATTACH TO.


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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Nordyne FEH017HA-04 furnace wiring


This should be 110v so you will have black wires, white wires and ground wires. The grounds wires both go to the ground bar, the whites wires both go to the nuetral bar, or can be wire nutted together, the black incoming (feed) wire goes to the buss bar that the breaker plugs into and the black going to the furnace goes into the breaker lug.

Nov 12, 2009 | Electric Circuit Breaker Kit for Furnace

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Fan will come on for heat(auto), but not for AC or set to ON


You have a blower relay in the furnace that's probably bad. In the heat mode the blower is on a temperature relay, in cooling mode the blower has to come on immediately so there is another relay for cooling. The green wire on the thermostat feeds that relay, so if you go to the furnace and shut the power off and find the green wire from the thermostat that feeds that relay and replace it, being careful to mark all the wires before removing them, also the relay terminals have numbers for identification.

Apr 07, 2009 | Heating & Cooling

1 Answer

Replacing blower motor in furnace w/Fasco brand #D727


Some one missed the wiring diagram. I believe its like this:
L1 = Line 1 = (Hot all are same thing)
Black Hi
Blue Med
Red LO
Now usually the black is for AC and connects to a normally Open (NO) contact on the blower relay.
The heater speed (either red or blue) go the the normally Closed (NC) on the blower relay and on one side of this wire or contact on the relay it goes to the heating blower thermostat on the furnace.
The remaining wire (blue or red) you tape off.
L1 also feeds the Run Capacitor on 1 side and the Brown wire feeds the opposite side

The white wire is Neutral and goes to the neutral on the main line.

If this helps you please rate me accordingly and good luck.








Mar 13, 2009 | Kitchen Appliances - Others

1 Answer

Bad sequencer or fan relay?


does ANYTHING come on when set to heat?

Feb 28, 2009 | Heating & Cooling

1 Answer

How do i hook up my humidifier using a seperate transformer


If you chose to install this with an auxilary transformer. Turn the main power off to the furnace. Mount the transformer on the handi box to the furnace or inside the furnace cabinet. Wire the primary wires from the transformer to the main power coming into the furnace. Connect black to black and white to white. Wire the secondary side of the transformer in "series" with a #50 relay, the humidistat, the solenoid valve and back to the transformer. Determine which wire powers the blower motor for the heating speed. Clamp the #50 relay to the wire.
Good luck
HVAC Teacher

Feb 22, 2009 | Honeywell HE260A1010 Whole House...

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