Question about Intertherm Heating & Cooling

10 Answers

I have an intertherm center heater. I just purchsed the new house and it finally became summer. I tried to turn the fan on only as I am used to in other homes. However, the fan does not come on. I looked in the inside of the heater and see that a gray wire is not hooked up, which may be the fan relay??? Any help appreciated.

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  • mceach Jul 01, 2008

    There are still two wires left from Therostat not attached - blue and yellow AND a gray wire from the heater unit itself not attached???????????

  • mceach Jul 01, 2008

    The heater works fine with the fan when in heat mode and turning up the thermostate but it won't work in the FAN MODE ONLY

  • mceach Jul 01, 2008

    My question is should the GREY wire from the heater be attached to one of the wires from the thermostat? Gray wire not connected to anything in the heater?????

  • mceach Jul 01, 2008

    Heater unit is Intertherm E3EB-015H and therostat is Honeywell...The thermostate is for both heat and air cond but I only have a heater

  • mceach Jul 01, 2008

    You can go tohttp://www.nordyne.com/Literature/710386... to see the wiring diagram for the unit

  • mceach Jul 01, 2008

    What!

  • mceach Jul 01, 2008

    Intertherm Model 904131 E3EB-015H

  • mceach Jul 01, 2008

    In the therostat all 4 wires are screwed into slots....the red in Rh, Blu in Rc, white in W, Yellow in Y, and Green in G....HOWEVER, in the furnace the blue and yellow are not connected to anything....???

  • mceach Jul 01, 2008

    I connected the yellow and green therostat wires together on the furnace side to the green heater wire but still not fan only....

  • mceach Jul 01, 2008

    I have the wiring guide http://www.nordyne.com/Literature/710386

  • mceach Jul 01, 2008

    That link didn't help - it doesn't even list furnaces.

  • mceach Jul 01, 2008

    the link did NOT HELP - no heater problem there only air conditioning and I don't have air

  • mceach Jul 01, 2008

    The diagram above is on the furnace...so the green wire is the fan for the heat, I would connect whichever wire (Yellow or blue) that runs the air portion and also hook that up to the green, then when I put it in air condition mode it should run the fan????

  • mceach Jul 02, 2008

    I fixed the problem myself after going to Honeywell install manual. I had to jump the two wires in the therostate box. Thx for all your attempts

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Site for wiring diagram;..
http://www.xpedio.carrier.com/ide/groups/public/documents/techlit/
ag-maba-03.pdf

Posted on Jul 02, 2008

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Hello mceach please bear with me on this. If you could please give me a model number on the thermostat I am curious if it has a bypass option which would strike the g terminal running the fan. I am also looking in my nordyne literature to confirm the addressing of the wiring in the fan relay. Just as soon as I have more info I will comment again, but the thermostat model number sure would be handy.

Posted on Jul 02, 2008

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Is the wiring diagram you have for te furnace or thermostat? If you have the diagram for the furnace, locate the circuit that controls the fan, then try wiring the air side of the thermostat to that circuit. This should allow you to control the fan only with the air settings on the thermostat.

Posted on Jul 01, 2008

  • Ryan Rogers
    Ryan Rogers Jul 02, 2008

    Glad you got it fixed. Sorry we weren't much help, maybe next time.

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As you possibly dont have a wiring diagram or service manual, to avoid a sort circuit, better take it to an authorized service to check its wiring internal connections.

Posted on Jul 01, 2008

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Posted on Jul 01, 2008

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Http://www.nordyne.com/Literature/7103860.pdf

According to the wiring diagram and standard wire routing a wire should go from the "G" terminal on the thermostat and "G" terminal ( or green pig tail at the heater.)

Posted on Jul 01, 2008

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  • James Helmer
    James Helmer Jul 01, 2008

    Grey wire at the heater you seen is an extra speed wire which is not used.

  • James Helmer
    James Helmer Jul 01, 2008

    At your thermostat; The Rh is for power to the thermostat.
    The W is for the heating control.
    The Y terminal is for the air conditioning unit which you do not have.
    The G terminal is for the fan relay which turns on the fan from the thermostat.

    On your thermostat there would normally be a jumper between Rh & Rc because you have but one transformer supplying the power. The G terminal at the thermostat must be connected to the Green pig tail or G terminal at the furnace.


  • James Helmer
    James Helmer Jul 02, 2008

    I can see clearly that there is a bad communication problem here.
    There seems to be so very many solutions to a simple problem that only cause confusion to the person on the other end who is trying to accomplish the task.

    Yellow and blue wires are only for A/C application. If they have been connected together in any manor disconnect them from each other.

    Connect the G thermostat terminal wire to the green pig tail wire on the IFR wire as shown on the diagram. That should take care of your problem. If you are in doubt in any way call in an A/C or heating tech to solve your problem.


  • James Helmer
    James Helmer Jul 07, 2008

    I'm willing to bet this guy jumpered Rc & Rh at the thermostat as was stated in my second post.

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Model No..Plz

Posted on Jul 01, 2008

  • Yaz  S
    Yaz S Jul 01, 2008
  • Yaz  S
    Yaz S Jul 01, 2008

    i know that the link above is E2 series, but u cud compare for similarities if possible.



    i really hope that this helps



    All the best



    Thank you for using Fixya.

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Have your problem solved you had rated some1 as best solution.reply

Posted on Jul 01, 2008

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It could be a bad switch/control circuit and that is why it won't work in that mode only.
Thanks,
lee

Posted on Jul 01, 2008

  • 3 more comments 
  • Lee A.
    Lee A. Jul 01, 2008

    Have you tested it with a multimeter to see if/when juice is flowing out of it? What is the exact model of the unit?
    Thanks,
    Lee


  • Lee A.
    Lee A. Jul 01, 2008


    Outdoor reset sensor is what i believe the gray wire is. It is used for adjusting the temperature inside the house compared to outside. I don't believe this is what you are looking for.Thanks,
    Lee



  • Lee A.
    Lee A. Jul 01, 2008

    You purchase the sensor to hook up with the wire seperately and that is why it is most likely not connected to anything.
    Thanks,
    Lee


  • Lee A.
    Lee A. Jul 01, 2008

    Ok, then that is definitely what the gray wire is for then. So you have never witnessed the fan working then in only fan mode? Do you know if the unit is under warranty at all?
    Thanks,
    Lee


  • Lee A.
    Lee A. Jul 02, 2008

    Well i believe a few people basically suggested that same thing exactly to look at your manual and to wire it properly. I think you should have found someones solution helpful and accept it as they gave you great information and avenues to search.
    thanks,
    Lee


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The problem is because of the loose connections i think so ,if you have warranty for your device then go for it,because repairing by own may void warranty.And also without seeing ,we cant repair by trial and error method ,so better go to serivce center and service it

Posted on Jul 01, 2008

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