I just bought today a 1994 530i knowing the air conditioning wasn't working. I thought I might get lucky and it would be just a fuse. Well after I got it home I realized the fuses were fine. The compressor does not engage but I can spin it by hand. The aux fan is also not working at all but the blade spins freely. When I press the air conditioning button I hear a slight difference in the motor but no compressor engagement. Is it possible for both the compressor and aux fan to go bad at the same time? I also checked the sight glass and depressed both suction and discharge nipples. Did not see anything in the sightglass and no sound came from the nipples when depressed. Any thoughts would be greatly appreciated. I believe the system is empty. The previous owner told me it worked fine until a month ago and he didn't want to dump anymore money into it. Thanks