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Re: Coupe Quattro 90 air conditioner question.
In a message dated 95-09-14 09:06:02 EDT, you write:
> A/C in my 4KCSQ has the same symptons. Just as it would slowly stop
> cooling, I can smell a smell not unlike defrosting ice. I believe the
> coils are freezing up. Hooked up to the fancy machine , the pressures on
> the high side and low side look just fine. We pulled the vacumn on the
> system and it held it. We then charged the system with the specified
> amount of Freon. Alas..(sigh) the problem persists. I took it back and
> put on the machine to check for leaks (we pulled the freon out to see if
> the same amount put in originally was still in the system). The original
> amount of freon was still in the system.
Recently read that when doing A/C repairs, replace the receiver/dryer if the
system has been open to atmosphere for more than a few hours. I believe this
thing has some kind of dessicant in it to remove moisture from the circuit
(duh). In a closed, freon-charged system, all's well. leave it open to
atmo, it picks up moisture, lessening its ability to do the same job once you
close up the system and recharge. Pulling a vacuum on the system before
recharge won't get the moisture out of the thing. This may be what's causing
the freeze-ups people are reporting.