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  1. #1

    Default 99 Sub AC Charging Pressure Question

    My high pressure value that's used when you check pressure started to leak and lost all my 134A, I recharged with 58 oz of new synthetic and when I checked my pressures when it was 72 degrees my reading was 35L / 175H is this an OK reading? or is it still low, my condenser said 3# 8 oz for my dual air on 99 Suburban 4x4 350, air is coming out cold, just want to make sure I'm not to low on pressure, I saw a post for 40-45 / 190-210

    Is This OK

  2. #2

    Default

    Quote Originally Posted by dhpgac View Post
    My high pressure value that's used when you check pressure started to leak and lost all my 134A, I recharged with 58 oz of new synthetic and when I checked my pressures when it was 72 degrees my reading was 35L / 175H is this an OK reading? or is it still low, my condenser said 3# 8 oz for my dual air on 99 Suburban 4x4 350, air is coming out cold, just want to make sure I'm not to low on pressure, I saw a post for 40-45 / 190-210

    Is This OK
    Looks ok at 72F outside temp if you followed tha factory recommended charge weight. Did you change the HS schrader valve?
    2011 Chevy Silverado LT 4WD 30k miles
    2001 Suburban 2WD, 5.3, V8 185k miles
    1993 964
    1996 318TI

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