My '90 535iA AC doesn't blow cold at the moment. I took it to an indy that found around 50PSI on the system with his guages. One question is whether there is a site glass on this E34 (there is on my '89 325i)? Second question relates to proper AC system psi and whether a low pressure switch is inactive if the system is too low? This indy says I can take a chance and throw a pound of expensive R12 in to see if it works but that it could be something else. The compressor does not come on when the AC button is pushed in.
Anyone know anything about this, please?
Jon