I <3 Jeep

Hi guys and gals. I have been reading through the forums here for some time, and cannot find an answer. I apologize if I have posted this in the wrong area. I am really stumped on this one. My A/C clutch is cycling about once a minute. Comes on for about 5 seconds, then shuts off. I am not running the A/C or the Defrost. A/C works fine when I am trying to use it. I know that when running defrost it will cycle on and off, but I am just running straight heat, through the dash vents. I am thinking maybe the relay, but that doesn't make sense, since it works fine when running A/C. It doesn't seem like a short either, since I stood there for 5 minutes watching it, and it is definitely on a "schedule". Any ideas would be greatly appreciated. Thank you!