Date:         Wed, 15 Jul 1998 09:53:46 -0700
Reply-To:     jim catterson <termite@ROCKETMAIL.COM>
Sender:       Vanagon Mailing List <Vanagon@vanagon.com>
From:         jim catterson <termite@ROCKETMAIL.COM>
Subject:      Re: Question About EV A/C dryer/receiver
Comments: To: vanagon@vanagon.com
Content-Type: text/plain; charset=us-ascii

just as a follow up to don gibbons' comments about pressure buildup in
the a/c system of the ev.  although the pressure relief valve is
supposed to vent freon (and oil) when the pressure rises too far,  the
usual cause of the drastic increase in pressure is the failure of the
ballast resistors that control the cooling fans.  this is the primary
cause of a/c destruction in ev's.  sooner or later,  the pressure
relief valve will not work quick enough and the remainder of the
system will take a beating ($$$!).  check those resistors first.  if
they are black instead of green,  then they are cooked and need
replacing....

cheers
jim catterson
91 syncro
93 ev gl                  ny





---Don Gibbons  wrote:
>
> This has/is happening to me to. The dryer also has a safety valve
that will vent
> your freon should the system pressure get too high. There are also
two types,
> one has a long "hex" part that sticks out about 2" from the unit.
The other has
> what just what looks like a plug. I made a stainless steel sleeve
and epoxied it
> in place. Been good for a year now.
>
> They both do the same thing, blow off at a certain pressure.
>
> Bad news. You do not seem to be able to get just the plug/valve from
VW.
>
> Good news. You can get it from NAPA. I will dig and find the part
number.
>
> Bad news. You can not do this yourself. The thing to do is get the
new part,
> bring it to a AC service place (maybe the dealer) and tell them to
do it.
>
> As for the oil. Every aC system also has a certain amount of oil for
lubeing the
> system. This is what you have been seeing. As long as it stays small
leaks its
> ok. But its just a sign that it will blow soon. Then you will not
only loose the
> freon but alot of oil too. If you then keep driving with the system
turned off
> the compressor will in time (a long time) start to free wheel and
since it has
> lost its oil the compressor will sieze up.
>
> Not that this will happen right now. It will take time. But this is
a case that
> a small investment in repairs will save you $$$$ in the future.
>

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