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

    Mar 17, 2010, 11:47 AM
    4 Flashes --Open temperature limit crane XL90
    One yr ago, I replaced the flame sensor;
    Now, after 12 mo. I get: 4 Flashes --Open temperature limit
    On my Crane XL90 furnace; what's my best action plan now?
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
    Ultra Member
    		  
    #2

    Mar 17, 2010, 03:38 PM

    Take out the limit switch, tap it and blow of the dust and put it back in. If this does not work get e new one
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #3

    Mar 17, 2010, 03:42 PM

    Make sure furnace filter is clean. Restricted air flow will cause furnace to overheat.
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