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    tjr4377's Avatar
    tjr4377 Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Mar 16, 2009, 03:34 PM
    Furnace will not ignite blower constintly runs
    I have a propane furnace that will not ignite. The blower runs constintly unless you phyically shut it off. What could be wrong? Thanks, Tim
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Mar 16, 2009, 03:38 PM
    Brand and Exact model?
    tjr4377's Avatar
    tjr4377 Posts: 3, Reputation: 1
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    #3

    Mar 16, 2009, 04:24 PM
    Quote Originally Posted by hvac1000 View Post
    brand and exact model?
    Nordyne model m3rl08oa bw
    tjr4377's Avatar
    tjr4377 Posts: 3, Reputation: 1
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    #4

    Mar 16, 2009, 04:26 PM
    Quote Originally Posted by tjr4377 View Post
    nordyne model m3rl08oa bw
    Nordyne model m3rl080a bw
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
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    #5

    Mar 16, 2009, 07:47 PM
    Most modern furnace control systems will default to a continuous fan and defeat all other functions (i.e. no heat) if a limit circuit is open, and in most cases the limit circuit is identifiable by red low voltage wires. Check the limit control device(s) for a broken circuit.
    white732's Avatar
    white732 Posts: 4, Reputation: 1
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    #6

    Mar 16, 2009, 09:42 PM
    It may be the igniter or the gas valve. If your furnace has a carbon type "hot surface" igniter, you may want to check it for cracks. You also may want to check the LP tank and it is possible for your pressure regulator to have gone bad.
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