My A/C only works for about 10 min and then the clutch will not engage again until the engine is completly cooled off. When it works for the 10 min it is cold. I had it in for service and it has no leaks and the proper amount of refrigerant but when I got it back the A/C will not come on at all? Also when you jump out the presure sensors it will not come on either.

 

Check for excessive clutch gap. Perform a shimectomy if the gap is excessive.