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    Moose1123's Avatar
    Moose1123 Posts: 33, Reputation: 4
    Junior Member
    		  
    #1

    Jan 16, 2008, 12:44 PM
    Spill or Aux Limit switch
    My York Diamond 80 is not heating. When I turn it on the fan starts but flame does not attempt to ignite. The diagnostic code flashes 4 times. Sheet says 'Aux. Or Spill Limit switch'
    What are these? Where are they? Can they be reset?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jan 16, 2008, 03:41 PM
    Usually no to a reset. You need to find the cause of the problem before you reset the control anyway.
    Pilzer's Avatar
    Pilzer Posts: 5, Reputation: 1
    New Member
    		  
    #3

    Sep 25, 2009, 06:23 PM

    What is a spill limit switch? The question wasn't answered. How can someone fix a problem if they do not know what a spill limiot switch is? And so I ask again... What is a Spill Limit switch on a York Diamond 80 Furnace?
    NorthernHeat's Avatar
    NorthernHeat Posts: 1,455, Reputation: 132
    Ultra Member
    		  
    #4

    Sep 25, 2009, 06:34 PM

    This question is in part answered at https://www.askmehelpdesk.com/heatin...eat-58313.html

    It is not something we want to answer because this safety device might be trying to save your life.
    Pilzer's Avatar
    Pilzer Posts: 5, Reputation: 1
    New Member
    		  
    #5

    Sep 25, 2009, 06:54 PM

    Uh thanks I tried loaading that page and my browser said "no" I though my puter thought the page funky. I will try again. Thanks. :)
    Pilzer's Avatar
    Pilzer Posts: 5, Reputation: 1
    New Member
    		  
    #6

    Sep 25, 2009, 06:59 PM

    Tried again and that page is full of pop-ups. My pop-ups are turned off. I turned my pop-ups on and the page won't load. So a spill limit switch is some sort of safety device? Is it a monoxide sensor?
    NorthernHeat's Avatar
    NorthernHeat Posts: 1,455, Reputation: 132
    Ultra Member
    		  
    #7

    Sep 25, 2009, 07:38 PM

    It is a temperature sensing device. If the flue gasses don't escape the way they should it overheats and trips, rather than filling your home with CO
    NorthernHeat's Avatar
    NorthernHeat Posts: 1,455, Reputation: 132
    Ultra Member
    		  
    #8

    Sep 25, 2009, 07:40 PM
    It can also be positioned to prevent flames from rolling out of the heat exchanger and causing an explosion or fire.
    NorthernHeat's Avatar
    NorthernHeat Posts: 1,455, Reputation: 132
    Ultra Member
    		  
    #9

    Sep 25, 2009, 07:44 PM
    Quote Originally Posted by Pilzer View Post
    uh thanks I tried loaading that page and my browser said "no" I though my puter thought the page funky. I will try again. thx. :)
    I can't explain why the pop ups are you using a good up to date virus program?

    It is a link to the FAQ's on Helpmeaskdesk's HVAC start page. That sticky note at the very top of the page that says " Sticky: Heating & Cooling Maintenance, Repair & Troubleshooting FAQ from NortherHeat"
    Pilzer's Avatar
    Pilzer Posts: 5, Reputation: 1
    New Member
    		  
    #10

    Sep 26, 2009, 07:57 AM

    Don't know why the 'puter acts so funny either. 'tis an old abused 'puter. My kids play weird online games-webkins etc. Thank you for the clarification on the spill limit switch thing. I guess I should see a pro :)
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