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    shawnwheeler85's Avatar
    shawnwheeler85 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Nov 30, 2011, 06:20 PM
    Pressure switch reading open when it should be closed on a concord furanace
    I have a concord hvac that has a smart vavle. I change the vavle now its reading that the pressure switch is open when it should be closed. The unit would light at first then go out after about 20 to 30 sec. now it won't do any thing right be the vavle should open or tell the ingtor to light it just goes off and gives me a code of 3 flashes witch is the pressure switch. Can this stop the unit from lighting or any of the other problems I was having
    drtom4444's Avatar
    drtom4444 Posts: 3,282, Reputation: 145
    Ultra Member
    		  
    #2

    Dec 1, 2011, 01:31 AM
    An open pressure switch will keep it from lighting. DrTom4444
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