Hi Folks,

On Sunday my son and I went to the local air show for some high-speed
entertainment.  When we left, I wanted to cool down the '91 Carat as "fast"
as possible so opened the doors, cranked the engine up and turned the AC and
fan on max.  About a minute later I had some unanticipated enterntainment
when I heard a pop at the rear of the cabin and hissing sound (not unlike a
bicycle tire going flat) for about 2 minutes.  Once I assured myself that I
really didn't have a flat I guessed that the sound I heard was my AC system
dumping all the 134a (yes it was converted by the PO using the kit) into the
van.  Whatever my van was leaking smelled of rubber - not burning rubber,
but just like air that has been in a tire (thats tyre for Clive and Andrew
;-) )

So,

A)  Amongst other things, I'm an HVAC moron, if you can, and will, help me
with this - please feel free to break out the finger puppets.
B)  Is there a safety relief valve in these AC systems that will go, or am I
probably looking at a blown line, hose etc. ?

TIA

Barry
1991 Vanagon "Sauna"