Minor correction to my last post, the high pressure relief in NOT on the compressor, it is on the block with the high pressure cut-out switch. On most cars it is near the accumulater, on some it is by the condensor coil on the left. If your car doesn't have it maybe the shop that did the conversion removed it. To run R-134 you have to run higher pressures and the switch and relief valve can't handle it. Instead of replacing with higher pressure parts they were maybe just removed. I am guessing the discharge hose running from the compressor outlet to the condensor coil failed from age and the high pressure of the 134. Pressurize the system and listen for hissing from the hose. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, Michiel Böhmer <michiel.bohmer@xxxx> wrote: > Dear list-members, > > I'm lost here. I have AC troubles and I can't find my answers in the archive.