This has happened to me once or twice in the past few years, but about 4 times this weekend (over 80 degrees out of course... may be related). The A/C works fine in cool weather, but sometimes in very hot weather, it runs good when the car is started, then it starts getting *really* cold - icy cold - then suddenly stops working and warm humid air blows out the vents. Turning the car or the A/C switch off for a few minutes and re-starting fixes the problem and we have cold air again.

This weekend we went on a road trip in 80+ degree weather and this was very annoying.

I suspect it is a sensor problem, since the A/C itself is certainly blowing cold air almost all the time.

Any hints on where I might have a problem?

Thanks and have a great weekend :)