Thanks for the ideas, the circulation switch is where it has always been, I never move it.
The light on the switch stays on and so does the AC, unless I turn the fan off, then the light on the switch goes out, the AC switch will not turn the AC off. Also, the defroster is not on, I've never used it either.
Probably a bad switch or some sensor failed, looks like a trip to the dealer is in my future, I need to get one of my free oil changes anyway.
Thanks for your help!