The A/C is set up to cut out if the engine water jacket temperature is "too high". So my question would be this: "When the A/C cuts out, just where, EXACTLY, on the scale is the water temperature needle?"

From what little information you gave, it sounds to me like it (the A/C) is operating normally but your car is overheating. The fan should NOT come on and run almost anytime the car is moving - mine doesn't, even in 95F or so weather - unless, of course, I'm sitting still for a time. (Ok, fine, the fan runs, but not at any speed you can hear it running, if I'm moving at all.)


Are you getting any warning lights on the dash when the A/C cuts out? If so, what lights are coming on?