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-   -   LENNOX Furnace fan won't SHUT off? Won't come on on AUTO? (https://www.askmehelpdesk.com/showthread.php?t=153462)

  • Nov 18, 2007, 06:38 PM
    SABREMAN
    Quote:

    Originally Posted by hixton
    it sounds like the camstat might be bad or the low speed on the blower windings are out you could try switching speeds the red wire is low yellow is medium and black is high try a different speed if that works then low speed is out if not replace the camstat

    Ok so which wire do I wire the yellow into..
  • Nov 18, 2007, 06:58 PM
    hixton
    The black wire coming down from the camstat the black wire that was hooked up to the red that went to the blower
  • Nov 18, 2007, 06:59 PM
    hixton
    Disconnect the red put tape over the end of the red wire hook up the yellow then
  • Nov 18, 2007, 07:13 PM
    SABREMAN
    Quote:

    Originally Posted by hixton
    disconnect the red put tape over the end of the red wire hook up the yellow then

    Ok two camstat wires coming down from top.. both black...

    One is hooked into middle of relay.. the other is hooked to power source..

    Thre was not any other wires hooked to the blower.. just the white to the neutral..

    So where to hook up the yellow? where the white was hooked? Probably not is what my gut tells me, but?
  • Nov 18, 2007, 07:31 PM
    hixton
    Where was the red wire hook to did the red go to the relay ?is there a diagram you can read there should be one black wire that goes to the power source then to the relay from the normal close contact to the camstat then back to the red wire on the blower
  • Nov 18, 2007, 07:38 PM
    SABREMAN
    Quote:

    Originally Posted by hixton
    where was the red wire hook to did the red go to the relay ?is there a diagram you can read there should be one black wire that goes to the power source then to the relay from the normal close contact to the camstat then back to the red wire on the blower

    Red wire was capped off when I got it from the guy.. so should I hook the red to fan relay(black wire that is not hooked up).. keep the white hooked to neutral..

    All of the wires from camstat go directly back to relay.. but don't hook to anything else..
  • Nov 18, 2007, 07:52 PM
    hixton
    Leave the white to neutral hook to the red to wire on the relay the one coming back from the camstat
  • Nov 18, 2007, 08:11 PM
    SABREMAN
    Quote:

    Originally Posted by hixton
    leave the white to neutral hook to the red to wire on the relay the one coming back from the camstat

    OK.. I thoght that was it, but wanted to make sure before... I fryed somethi8ng.. :eek:

    Anything I should do, what about yellow wire for cooling.. I don't have ac on this furnce hooked up..

    Thanks again
  • Nov 18, 2007, 08:15 PM
    hixton
    The black wire is for cooling and that hooks up to the relay I think on terminal # 3 I hope everything is working and your welcome
  • Nov 18, 2007, 08:28 PM
    SABREMAN
    Quote:

    Originally Posted by hixton
    the black wire is for cooling and that hooks up to the relay I think on terminal # 3 I hope everything is working and your welcome


    Ok hooked everything up, blower kicked on right away.. no hot air though out pipes! GRRR..

    It is very warm on outlet flue? Should that be hotter?
  • Nov 18, 2007, 09:24 PM
    hixton
    It should be about 130 degrees and it should shut off at 105 there is a heater usually on a camstat to kick it on more quick if you hook up the duct work so you don't take air out of the basement it will be a lot warmer
  • Nov 18, 2007, 09:48 PM
    SABREMAN
    Quote:

    Originally Posted by hixton
    it should be about 130 degrees and it should shut off at 105 there is a heater usually on a camstat to kick it on quicker if you hook up the duct work so you don't take air out of the basement it will be a lot warmer

    I got it set to 115 degrees , it will go to 120.. I can set it there.. working on cutting cold air to hook back up...

    So I got this thing wired right you think?
  • Nov 19, 2007, 04:36 AM
    hixton
    I think so
  • Nov 19, 2007, 09:29 AM
    SABREMAN
    Quote:

    Originally Posted by hixton
    i think so

    Well thanks for all your help, found out why the fan wouldn't kick on unless hard wired, I had a wire coming from cam stat that I hooked into fan spped red wire, works good now... just doesn't blow out hot air yet.. we'll give it couple of days and see if we can warm up air in house...

    My Family and I wish you a Happy Thanksgiving!

    :D :)

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