This thread helped me too, with my recently acquired '96 Impreza Outback. I'm used to mid-90s "Brand-H" cars, and I think they leave the compressor on all the time and regulate temp by the expansion valve at the evaporator. to call for more cool, the valve squeezes down harder and makes the compressor work harder - at least that's my understanding. On my '96 Impreza, the AC clutch is kinda loud when it cycles on, but I don't know whether to be concerned about that. (No slipping sound, just that the "click" is quite noticeable.) The AC seems to function pretty well. At least I was interested in knowing whether the clutch is designed to cycle on/off on this car rather than the cycling being an indicator of marginal refrig. level.
Thanks to all of you knowledgeable Soobie people willing to help us n00bs!
Bry