Golf IV / Jetta IV :: AC Slowing Down / Refrigerant Low


Aug 10, 2014

My AC is slowing down and needed diagnostics. Fan system is fine. So I hooked up my manifold guage set from HF and got 90 on both high and low static, and 35/175 under load. Temp was 83 Fahrenheit with 36% humidity.

My diagnosis - refrigerant low. (i.e. low/low)

So what kind of quantity can I assume I'm down? Do these german ac run on the high side? I'm going to pour in the PAG 46 myself through the yellow line, and that runs roughly 5 to 1 to the refrigerant. NO SEALANT. Just a 12 ounce can of 134a and 3 ounces of PAG 46.

Just to verify - it is PAG 46 for the 2004 Jetta 2.0 GLS?

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