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-   -   Furnace will not ignite blower constintly runs (https://www.askmehelpdesk.com/showthread.php?t=330081)

  • Mar 16, 2009, 03:34 PM
    tjr4377
    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
  • Mar 16, 2009, 03:38 PM
    hvac1000
    Brand and Exact model?
  • Mar 16, 2009, 04:24 PM
    tjr4377
    Quote:
    Originally Posted by hvac1000 View Post
    brand and exact model?
    Nordyne model m3rl08oa bw
  • Mar 16, 2009, 04:26 PM
    tjr4377
    Quote:
    Originally Posted by tjr4377 View Post
    nordyne model m3rl08oa bw
    Nordyne model m3rl080a bw
  • Mar 16, 2009, 07:47 PM
    KC13
    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.
  • Mar 16, 2009, 09:42 PM
    white732
    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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