When the shops ran over the system with a sniffer, did they bother to run it up under the dash to see if the evaporator is leaking?
Does the compressor or somewhere in the line have a high pressure safety blow off valve? Most systems do and if those things fail or get weak, the first time you are stuck at a light in the heat with the ac on , they'll pop open and out it goes. Usually you'll hear it and see a fog coming out from under the car for a few seconds, but if they fail in slow release, you'll never notice it. -------Robert archer wrote: > Been trying to fix a slow A/C leak in an '83 240D off and on for the past > several months. Two local shops were not able to find the leak with their > freon detectors, and I haven't been able to find it with four cans of UV > dyed freon and a high tech UV source from a lab. I've checked the > condensate water from the evaporator several times for UV dye with negative > results. I can pull it down with a vacuum pump and put in the required > weight of 134a one day, drive it that day with plenty of cold air blowing, > and the next day there will be absolutely no pressure showing on the low > pressure gauge. I've never replaced any O-rings and the low pressure rubber > return line from the evaporator is the original. I'm wondering what the > next thing to do would be? > Thanks. > Gerry Archer > '83 300D and 240D > > > _______________________________________ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
