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Date:         Sat, 7 Jul 2012 16:16:50 -0500
Reply-To:     JRodgers <jrodgers113@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         JRodgers <jrodgers113@GMAIL.COM>
Subject:      AC Servicing
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Lost the cool over time in my red vanagon. The AC system was gone completely through early last fall, with all new seals,vacuum and pressure checks, new compressor, expansion valve, dryer, etc. Gave it the whole nine yards. Worked great until recently. In this summer heat I have been running the system hard, and have slowly lost the cool. So - I have been studying Youtube videos to learn about AC, and get examples on how to self service. Have learned a lot. One video in particular caught my attention and that was regarding the Shraeder valves used in the high and low pressure service ports. I have learned that 80% of the leaking of refrigerant from the AC systems is from the Shrader valves. The remaining 20% is of course from other points in the systems. But this makes the case for checking the Shraeder valve as the first items on the maintenance checklist. Of course that can be done the same way one might check a propane tank - light a match, right? Of course I jest here - but using soapy water on the valve same a for a propane tank will show any leak at the Shraeder. If one has a leak, it raises the question: How does one change out the Shraeder valve without loosing the refrigerant? Well, turns out there is a little tool specially designed to do the job. Works slick as a whistle. Here is a link to a Youtube video showing a Shraeder valve change out using that little tool.

http://www.youtube.com/watch?v=Cfm6m01FfeI&feature=endscreen&NR=1

The videos on Youtube about AC systems and servicing are well worth watching. Takes the mystery out of AC.

Regards,

John Rodgers


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