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    king yellow's Avatar
    king yellow Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Mar 23, 2012, 08:52 AM
    Pressure switch to see if it's not working
    How do check a pressure switch to know if its bad?
    thermalmedics's Avatar
    thermalmedics Posts: 153, Reputation: 13
    Junior Member
    		  
    #2

    Mar 23, 2012, 09:32 AM
    What is specifically going on that makes you think the pressure switch is bad. Lo or high pressure? Straight cool a/c or heat pump. In cooling or heating?

    Do you have a set of manifold gauges and/or EPA certified by chance?

    Access to an ohmmeter?
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #3

    Mar 23, 2012, 06:27 PM
    Question, How do check a pressure switch to know if its bad?

    Answer,, if you don`t have correct tools, you can remove wires from pressure switch, jumper them together with a short piece if wire, ( do this briefly and just to test only, don`t operate furnace ,switch is a safety device "very important", for testing only) if furnace starts up and works you no the PS is bad,, again replace PS before using furnace
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