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Thread: TXV problem

  1. #1
    Join Date
    Nov 2016
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    TXV problem

    How do you know if the TXV is not opening like it should? Do take the inlet outlet temps? Or is there another way?

  2. #2
    Join Date
    Aug 2008
    Location
    Hibbing, MN
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    A/C, Refrigeration, Ice, or what?

    I would make sure there is a solid head of liquid getting to the valve, then measure superheat. Superheat too high, valve not opening enough.
    If God didn't want us to eat animals... He wouldn't have made them out of MEAT.

  3. #3
    Join Date
    Sep 2002
    Location
    Virginia
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    unstrap bulb , hold in your hand to warm it up , watch gauges , the low side should move a few psi

  4. #4
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    Nov 2016
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    Thread Starter
    How do you make sure there is a solid head of liquid getting to the valve?

  5. #5
    Join Date
    Sep 2014
    Location
    Portland, Oregon, United States
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    Check your subcooling, that should tell you if you have enough refrigerant. Sometimes you can hear it flashing off at the txv.

  6. Likes tmt0269 liked this post
  7. #6
    Join Date
    Mar 2016
    Location
    Marengo, IL
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    You need to check your superheat and subcooling and diagnose from there. If you have high subcooling entering the TXV and high superheat leaving the evap then you might have an issue with a restricted or faulty txv, but be sure to rule out any other possible causes.

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