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PSI range for Low side port

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by ahartnet, Aug 27, 2014.

  1. ahartnet

    ahartnet Junior Member

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    I've seen a couple of threads on this, but wasn't able to find the exact answer I am looking for, and I'm not smart enough to figure it out on my own.

    My A/C hasn't been seeming too cold lately. It works, it just takes a lot longer than I remember it last summer to get cool. I checked my low-side port using a "EZ chill" gauge I just bought. Doors open, AC max cold, recirculating and it was about 35 PSI - which I think is supposed to be about right. But I've seen it's dependent on ambient temperature - it was 90 degrees outside. According to the "EZ chilll" gauge, it suggests 45-55, which seems way to high to me based on what I've read in this forum.

    Any advice?

    Unrelated - I've only just started getting into DIY on my car. It's always been intimidating to me, but it's been a lot of fun, cost effective, and a lot easier than I would have though too!
     
    #1 ahartnet, Aug 27, 2014
  2. johnjamis

    johnjamis Junior Member

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    2012 Prius
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    Two

    If you see clear fluid flowing with no bubbles in the AC sight gauge, your refrigerant level is OK. If you see a continuous flow of bubbles, you probably need more fluid.
     
    #2 johnjamis, Aug 28, 2014
  3. exstudent

    exstudent Senior Member

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    Location:
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    2007 Prius
    Original thread w/ similar question you have. Specs below and Toyota testing procedure in this LINK, are for a 2007 Prius.

    Low Pressure 35PSI = .2413MPa(Mega-Pascal) [specifications .15MPa-.25MPa]. GOOD, w/in specifications.
    High Pressure not provided by OP. [specifications = 1.37MPa-1.57MPa]. UNKNOWN if High Pressure w/in specs.
    Online PSI to MPa converter. LINK
    ​
    Good luck.
     
    #3 exstudent, Sep 3, 2014
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