How much would they charge you to JUST evacuate the system and give it back
to you?  About a 15 minute job.

I had to replace the pressure switch on mine a few months back when I did a
system refurbish.
Also ended up with new O-rings everywhere, new condenser, new pressure
switch, new fan speed selection switch, receiver/dryer.
All in all, I think I spent ~$350 in parts plus another $150 in vacuum pump
and refrigerant, but I'm still so happy I did it, it was 104F yesterday!!!

-Ry
http://www.google.com/profiles/rylincoln

On Tue, Aug 10, 2010 at 8:52 AM, Michael Sullivan <sandwichhead@gmail.com>wrote:

> Thanks, David...That's what I thought, too.  Thing is, the A/C shop told me
> I needed the new pressure switch and then I pay them 379.00 to replace o
> rings, replace the freon, etc.  Sounds like I could save some $$ by doing
> it
> myself. I have had the van for about 2.5-3 years and the PO did the 134A
> conversion.  I don't think the system is in such bad shape.  I would like
> to
> install the switch myself and fill it and THEN take it to him if I have a
> problem.  Just don't want to vent the freon in the air.  Any ideas to avoid
> this?  I know this may sound stupid, but I made the DIY $20 Brake Bleeder
> and it has a tire stem installed....I wonder if I could utilize this to
> catch some of the freon?  Just brainstormin' Thanks again.
> CheapSkate Michael in San Antonio
> 91GL Weekender AT 2.1L 'Gringo'
>
>
>
> On Tue, Aug 10, 2010 at 8:31 AM, <dvdclarksn@aol.com> wrote:
>
> >  No. you will have to evacuate the system, replace the switch and then
> > recharge your ac.
> >
> > David Clarkson
> > 90 Westy
> >
> > -----Original Message-----
> > From: Michael Sullivan <sandwichhead@GMAIL.COM>
> > To: vanagon@GERRY.VANAGON.COM
> > Sent: Tue, Aug 10, 2010 8:49 am
> > Subject: Replacing pressure A/C Pressure switch w/o losing Freon
> >
> >
> >
> >
> > Can I take the pressure switch off the high pressure line in the DS side
> >
> >
> > rear D pillar and pop the new one in and NOT lose all the freon? Thanks.
> >
> > Michael in San Antonio
> >
> > 91GL Weekender AT 2.1L 'Gringo'
> >
> >
> >
> >
>