Hello, Have an 88 240, it has r134a fitting later compressor, and that part where you can look though a small glass hole near the radiator has been replaced. drove car to walmart dropped someone off, a/c was working great in fact too cold so i dialed the switch back a bit. came home, went to pick person up 30 minutes later and nothing, a/c does not work, I wouldn't think a charge would disappear that quick. normally if you have the switch to barely on you would at least hear the blower fan run real faint I don't hear that, I don't hear the normal clicks, I also checked the number 12 fuse. Iam just not sure where to go next.