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

    Oct 5, 2009, 11:03 AM
    Pressure sw.signal 3flash from led on circuit board.
    My goodman model #gmp075-3 has a trouble code . 3 flashes from led on circuit board. I replaced pressur sw.# b13701-33. The problem still exist. I blew through the rubber hose.no blockage. What else can I do?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Oct 5, 2009, 01:01 PM
    It could also be the ventor or the exhaust going to the outside could be blocked.

    Here is your complete service manual. This manual covers more than one model number SO make sure you use the sections for your unit!

    http://www.hvacpartsshop.com/Gmph075-4%20Series.Pdf
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