Newbie to chat with AC questions

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Rangerpathfinder74, Jun 23, 2025.

  1. Rangerpathfinder74

    Rangerpathfinder74 New Member

    Joined:
    Jun 23, 2025
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    Location:
    South Carolina
    Vehicle:
    2012 Prius
    Model:
    Five
    Have a 2012 Prius five. AC seemed a little warm so I decided to add some 134 a. First time I overfilled making the compressor cut on and off. I quickly relieved to the proper pressure and everything worked fine for about a month or six weeks. One or two times over the past week or so it would not blow cold. Today I hope gauge is up to it, and it was all the way in the red. I relieved pressure again to make it register in the green. What could cause pressure to overload without adding any Freon and it working for six weeks?
     
    #1 Rangerpathfinder74, Jun 23, 2025
  2. Tombukt2

    Tombukt2 Senior Member

    Joined:
    Nov 29, 2020
    12,900
    2,315
    0
    Location:
    Durham NC
    Vehicle:
    2009 Prius
    Model:
    Base
    Okay we're getting ahead of ourselves here first off the AC has no hi side wen not running so it shows about 100 pounds in red or very close . Start car air on hi etc now see gauge plummet to 37 on the gauge blue or lo . The separate sides do no exist until compressor running .
     
    #2 Tombukt2, Jun 23, 2025
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