Will we are talking AC woes my AC Clutch just stopped working this afternoon while traveling back home from a Burlington VW show.I checked at the D pillar #25 relay to see it has finally broke but can't find a way to do a check.
I checked my Bently for a way to see if #25 is dead with my ohm meter but no luck.
Is there a way to find out if the relay is ok? What would cause the break down of the AC clutch?
It's hot in Vermont !
Dennis J

Dennis Jowell
Scotch Hollow Farm
Newbury, Vermont 

> On Aug 5, 2016, at 10:30 AM, John Rodgers <jrodgers113@GMAIL.COM> wrote:
> 
> Ah! Enlightenment!!
> 
> The HFC152A  I have used is a close match to R12, just slightly less
> dense.  I didn't add any more oil.  It is entirely possible the wrong oil
> was put in when it was serviced. It bears flushing I think!
> 
> In my '91 Carat, there was still a small amount of pressure, even after 15
> or so years. It has never been converted to R134a, so the system should
> have only the mineral oil in it.  Perhaps even the original oil from the
> factory. Would that be a reasonable expectation.
> 
> Finally, this is a Sanden 709 compressor for reference.
> 
> Thanks
> 
> John
> 
>> On Aug 5, 2016 08:30, "Dennis Haynes" <d23haynes57@hotmail.com> wrote:
>> 
>> Flushing the system should include the condenser and evaporator. It all
>> gets loaded with oil. When are vans where built R12 with mineral oil was
>> still the prevalent standard. No need to mention other options. As for the
>> quantity that is the total quantity. When adding to the system you have to
>> consider what is still in the compressor. Too much oil is not good.  As
>> important as it is for compressor lubrication it is also a non-condensable
>> (or non-vaporizing) contaminant which reduces system efficiency  and excess
>> coating reduces heat transfer efficiency. PAG oil is generally used for OEM
>> R134a systems. The Ester oil is used more for conversions as it will mix
>> better with residual R12 oil and avoid the complications there.
>> 
>> Dennis
>> 
>> 
>> -----Original Message-----
>> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
>> Of John Rodgers
>> Sent: Friday, August 5, 2016 9:11 AM
>> To: vanagon@GERRY.VANAGON.COM
>> Subject: AC servicing woes
>> 
>> The kind of oil usec in the AC systems on my Vans has come into question.
>> In looking thru the BENTLEY,  Ifind no reference to AC oil at all.  At
>> ADVANCE AUTO PARTS their parts and service computer for the Vanagon shows
>> so many ounces of PAG OIL - or - so many ounces of mineral oil. Can anyone
>> quote me a rererence as to what it is supposed to be and what quantity???
>> 
>> Next question: when flushing the system, is it lines only or does the
>> flush material also get washed through the condenser and evaporator???
>> I have a new receiver/drier to put on after the flush.
>> 
>> John
>>