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  1. #1
    Jr. Apprentice
    Join Date
    Feb 2011
    Location
    San Diego CA
    Posts
    16

    Question AC not getting cold

    I just bought a 99 Suburban with 104,000 miles. The rear AC gets a little cool but the front does not get cold at all, the compressor kicks on and stays on, the gauge on the bottle of R-134A I bought reads just above 45psi and just into the alert range. I did not put any freon into the system since it read over full. Any ideas.
    Thanks

  2. #2
    Legend
    stephan's Avatar
    Join Date
    Sep 2010
    Location
    Far West, Oregon USA,
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    The guage is reading the low pressure side of the system, or you hooked it to the high side by accident & it is undercharged.. I don't know how much experience you have so please read cautions below.
    Do the following with out the freon can hooked to your system!!
    Start it up, turn on the AC & look at the sight window on the reciever drier. If you see bubbles, it needs a charge. You may need a mirror & flashlight to see the window.
    CAUTION
    Always wear safety goggles when working on AC because liquid freon will blind you if you get it in your eyes, & MAKE SURE you know the difference between the high side & the low side of the system, because accidently charging through the high side of the system will blow up the can!! If you have no AC experience, I would recommend that you take it to a shop to be charged if it needs it!!
    Last edited by stephan; 02-13-2011 at 07:46 PM.
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol


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