Date: Fri, 5 Aug 2016 21:19:55 -0500
Reply-To: John Rodgers <jrodgers113@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: John Rodgers <jrodgers113@GMAIL.COM>
Subject: Re: AC servicing woes
In-Reply-To: <CA+az7_56vX3Yd8OMAG3LjMYUSmRJBv6gk7SEfd3mkwQqMRFTzQ@mail.gmail.com>
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I turned on my AC and nothing. It would not run. It needed to engage when
the pressure was up enough to turn on the switch, I thought. Added a little
refrigerant, nothing. Removed the left D-pillar cover, looked for the
fusible link, (50 amp fuse)It was ash. I found that the late VW BEETLES use
that same fuseibl link, and I was able to get it at the local VW
dealership. I got two. One installed in the circuit, the other I tied in
place as a spare. It will always be there if needed.
Once the link was installed, the compressor kicked right in when the engine
was running and the AC switch turn on.
That's been my experience with the AC electricl so far. Still trying to
deal with the proper servicing of the system.
John
On Aug 5, 2016 18:01, "Dennis Haynes" <d23haynes57@hotmail.com> wrote:
You need to learn how to check circuits wit a voltmeter. Ohm meters check
devices and wiring. When a complex circuit doesn't work you start at one
end and work back to where the voltage is missing. If at a relay you go to
work on that to see if it is energized. The work on that as needed.
Short of something electrically failing it is possible the system locked at
for low or high pressure. These clutches rarely go bad. They can wear from
abuse to the point that air gap becomes too large for the coil to pull the
is late in. Again, check for voltage at the clutch. If the clutch is
getting power and not engaging than that is the problem.
Dennis,
From my phone.
________________________________
From: Dennis Jowell<mailto:dennisjowell@GMAIL.COM>
Sent: 8/5/2016 3:33 PM
To: vanagon@GERRY.VANAGON.COM<mailto:vanagon@GERRY.VANAGON.COM>
Subject: Re: AC servicing woes
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
>>
