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Thread: Reversing Valve

  1. #1
    Join Date
    Jun 2019
    Location
    So Cal
    Posts
    423
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    Reversing Valve

    Today i was working on a Climate Control water source HP.

    Unit was pushing out heat while in cooling mode.

    Checked the reverse valve coil and during heating, the valve is getting 24 volts and while in cooling it is receiving 0 volts.

    Shouldn't it be the opposite?

    My understanding is that the reverse valve only get energized while in cooling mode.

    Any ideas?

    Tstat connections used are;

    y1

    w/o

    g

    r

    c

    I opened up the tstat to verify connections were correct from stat to board and noticed that someone had reversed y and w on the stat, when i reversed it to the proper order, the fan comes on but never the compressor.

    I bypassed the stat and connected, y,g and r which brought on my fan then compressor but heat is still being produced. I thought i had figured out the cause, which would of been the reversing of the wires but i was not successful.

    If the valve is stuck on "heat" that still does not explain why the coil receives 24v while in heating mode.

    Any suggestions guys?

  2. #2
    Join Date
    Dec 2002
    Location
    SouthEast NC ICW & Piedmont Foothills
    Posts
    7,924
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    is the thermostat not wired to power the reversing valve?
    It`s better to be silent and thought the fool; than speak and remove all doubt.

  3. #3
    Join Date
    May 2016
    Location
    GA
    Posts
    147
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    Check magnetism on the reversing valve coil, Its rare but I have seen a few loose magnetization.

    Break 24V to the coil, listen to see if you hear the valve shifting.

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