I tried the search function but couldn't get any info to come up. My AC quit working today. Blower works, vents work, but no cold air. I checked the #5 fuse. It seemed OK but I replaced it anyway. When I hit the AC button on the climate control unit I cannot hear any relays clicking nor does the engine slow down a bit indicating that the compressor has kicked in. Other than low R-12, what are the reasons that the compressor is not actuating?

__________________
1986 560 SEL (159K miles)