Date: Sat, 21 Jul 2012 07:56:24 -0400
Reply-To: Larry Alofs <lalofs@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Larry Alofs <lalofs@GMAIL.COM>
Subject: Re: Air conditioning stumper
In-Reply-To: <CAFyWPwwMoaR7q_UT3WjM8zjSVUvFYTwGqUFJ8qc57AaiF8wwYw@mail.gmail.com>
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Need more info...
Can we assume that the system was, at some point, converted to 134?
What type of oil was in it and what type did you add? Some oils are
not compatible. Maybe some sludge has been produced.
Are you reasonably sure no air got into the system? Did you pump
it out with a vacuum pump before charging?
Where and how are you measuring the pressure? Does it go just to zero
or to some amount of vacuum when the compressor runs? By "freon" do
you mean R134a ?
Larry A.
On Fri, Jul 20, 2012 at 7:25 PM, A J I <flavanagon@gmail.com> wrote:
> I have a bit of a problem that just makes no sense to me at all. I tend to
> ramble so please be patient. I have an 87 GL and I can mostly keep it up
> and running. I replaced the two A/C hoses in the rear because they were
> rubbing together all these years and I never noticed. The high hose blew
> and spewed oil all over the corner of the compartment. It blew in the
> corner of the engine compartment just before it goes up the rear pillar.
> Since they were rubbing against each other I re-did both hoses. No real
> problem.
> The hoses were off for just a minimal time and I taped the system closed
> while working with the hoses. Got the new hoses on and everything tucked
> away. I installed an can of oil charge and then went to add the freon, here
> is the weird part. When the compressor is NOT on I can read pressure in the
> system but when I turn on the compressor the pressure goes to zero. For
> giggles I added a can of freon and then with the compressor off the gauge
> went over pressure -- well into the red, turned on the compressor and it
> wouldnt move, read zero.
> Whats up? Im guessing either the compressor is running in reverse-like that
> could happen- or there is a serious blockage. How can I tell where it is
> blocked? The easiest thing to change out would be the drier but I really
> dont want to start replacing parts until it works. I would rather just fix
> it right first time out. I just dont know what to test or how to test it. I
> have never had an A/C unit act like this so I am lost.
> Prior to the blown hose the system worked fine and I had probably one of
> the few vanagons that would freeze you out. We actually had to run it on
> low and that is really saying something for a blue van with a black roof (
> bedliner coated) here in central Fl. My wife is really wanting the A/C
> back, I get to hear about it every day so any help is really appreciated.
>
> Thanks all,
>
> A J
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