AC just started to act up. Any time I use the truck and shut it off, I lose AC for about 15 or so minutes. Then it works fine.. Until I shut it off and start again. Ive watched the clutch engage after the AC is on, click clack fairly often. When off and then a fresh start, it doesnt engage until after the " warm up " period, usually about 15 minutes.

Any ideas where to start? Just a new clutch? Thanks all.