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    martin79's Avatar
    martin79 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Oct 24, 2008, 07:03 AM
    Trane xe 80 open high temperature limit switch
    Furnace is about 13 years old... we just replaced the ignighter in it last night because it was running through all the steps to run except ignighting. It fired right up and ran for about 7-8 hours... now it won't ignite at all (it is running through all the steps it needs to except for ignighting). The L.E.D. indicator light is flashing 4 times which is says that there is a problem with the open high temperature limit switch. What and where is this and how can I, if at all, fix this myself??
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Oct 24, 2008, 10:04 AM
    There is a wiring diagram on the back side of the blower door that may help.
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