Quote:
Originally Posted by lsmalley
I replaced all the o-rings about a week ago. I also vacuum tested the system and had no leaks.I would think that with with the same pressure in the system that that would also indicate no leaks which is why I checked the static pressure because that at least shows me the system does have some pressure in it. When you say "force" the compressor to turn on, what do you mean? My compressor turns on when I press the a/c button. I can see the clutch turning. Also I can hear the faint noise the compressor makes from inside the cabin through the vents.
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When you say vacuum tested it does not answer the questions I asked in post #7.
Does the compressor come on, then cycle on and off?
It's possible you have sufficient Freon to get the compressor to turn on, but not enough to blow cold.
The characteristics of Freon 134a cause the cooling to act more like a step function vice a sinusoidal curve. Freon 134a will cool adequately if a sufficient amount is present, but as soon as you drop below the "sufficient" amount the vent temps drops off to ambient. R12, by comparison, will have a much more gradual temp rise as the Freon amount drops.
Again, if your return line is not cold (and you have good hi side pressure), then you do not have enough R134a in the system.