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    thaxter Posts: 0, Reputation: 1
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    Oct 9, 2006, 06:55 PM
    Combustion air problem code
    My 4yr old Bryant gas furnace shows a code that indicates, "Pressure switch not open"... check to make sure no cracks or (sags?? ) in PVC intake or vent to combustion-air... check to make sure no blockage at outside of house of pipe. I do not see any blockage outside nor any problem with the pipe inside. What is my next step short of calling for service?
    -Thaxter

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