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    Newadam's Avatar
    Newadam Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Nov 9, 2008, 05:43 PM
    Nordyne M1MB furnace will not start
    Hello I am hoping someone could help me on this site. It looks to be very friendly and helpful!

    I have a Nordyne M1MB gas furnace that blinks twice which means the pressure switch is stuck open with the inducer blower on. This is about all the information I can find so far.

    I am wondering if anyone can give me some advice on troubleshooting this problem. I have read the other posts here and on other sites but nothing that seems to help. Thanks for your time. :D
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Nov 9, 2008, 07:13 PM
    Tech info
    Please look through all this info and copy to your computer for future reference
    Locate the pressure switch and inducer blower. When comfortable with locations and other aspects of the furnace post back. PS the service manual has a boat load of info.


    http://www.nordyne.com/Literature/713a.pdf

    Install instructions +

    http://www.nordyne.com/Literature/7086720.pdf

    Addendum

    http://www.nordyne.com/Literature/7086730.pdf

    Replacement parts

    http://www.nordyne.com/Literature/707977d.pdf

    Repair/service manual.

    http://www.nordyne.com/Literature/690a.pdf

    More wiring

    http://www.nordyne.com/Literature/710150.pdf

    MORE

    http://www.nordyne.com/Literature/707764.pdf
    Williamalexx's Avatar
    Williamalexx Posts: 1, Reputation: 1
    New Member
    		  
    #3

    Dec 3, 2011, 07:36 PM
    Take the vacuum hose off and suck and blow on it with your mouth or a hand vacuum pump. This will limber it up after not being used all summer. If this does not work, check for restrictions in the hose and barb fittings and then replace the switch with one of the same pressure setting. The vacuum/pressure switch is one of the weakest links in the furnace most companies have a few problems with the pressure switch which is used to prove combustion venting.
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