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Posted by aka-SBM on July 15, 2006, 8:21 am
> Most good running AC systems run about 60 PSI on the low side. In
> order to get a vacuum (below atmospheric) on the low side, you'd need
> a leak on the high side. Low side leaks go to 0 PSI but not lower than
> that.
>
Umm...wrong on all counts Stormy.
To the OP, the answer that Stormy gave you here..is 150% worthless.
> The leak may be one or several. In any case, it means an hour or so to
> trace leaks, and repair them. At this point, it may be easier to get a
> new outdoor unit. If the leaks are in the outdoor unit. That would
> give you clean coils, newer higher efficency compressor, etc.
>
> --
>
> Christopher A. Young
> You can't shout down a troll.
> You have to starve them.
> .
>
> I have a 20 year old 4 ton split system on which the air handler and
> the compressor run but it doesn't produce any cool air. A tech
> checked
> the freon pressure and told me that it reads a vacuum on the low side.
>
>
> I presume that the low side pressure is meant to be lower than the
> high
> side to make the refrigerant flow. But does a vacuum reading on the
> low side mean that it is less than *ambient* pressure, i.e. is there
> air being sucked into system? Does this mean that there is a leak on
> the low pressure side (just prior to the pump)? Does it also indicate
> a severe leak and is there only air in the system now, and no
> refrigerant? Lastly, is this type of a leak generally fixable or is
> the unit dead and should be replaced?
>
> I've probably forgotten some critical information to include; will
> include it as requested, but hopefully this is something to start
> with.
>
>
> Thanks in advance.
>
>
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