'03 986S with AC problem

[Cbonilla]

Car had never given me any AC issues until just now. Got back in the car after a day of errands and nothing. More specifically, none of the fans come on in the cabin, I don't hear the AC compressor cut in (but I could be wrong), I can work the AC controls and all the right things happen -- display changes temp with a push of buttons, fan shows more/fewer bars, snowflake button switched display from/to auto.

Anyone want to suggest a diagnostic procedure, or offer advice from their own history? AC had been working fine until just now

FYI the car has 102k miles and is stock. Not sure if I imagined it, but the key seemed stiff when I was turning off the car

Thanks, Carlos