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

    Nov 5, 2007, 08:28 PM
    High limit open
    We have an Ultra V Tech 80 furnace. Cold air is coming out and the ignitors are not lit. Light is blinking 4 times which means high limit open. Where is this at? What needs to be done?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
     
    #2

    Nov 6, 2007, 05:14 PM
    Look on the wiring diagram that is located on the blower panel or other location on your furnace.

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