Good call, indeed. Before starting up this morning, I noted that the AC switch was off and the engine fan went on at the key accessory position. I then started the engine and turned on the air conditioning, which hadn't been run for some weeks, and drove to Walmart I also fiddled the rear window defroster switch because one portion was depressed more than the other, though the light wasn't on. I think this was irrelevant. Before arriving at my destination I shut down the AC and returned the key to the accessory position, the CD player rolling out Simon and Garfunkel, and the fan was not running. Restarting later, I noted the fan did not go on at the accessory position, and it did not run when I pulled the car into the garage and turned the switch to accessory and then off. So, I'm mystified but happy and won't have spend more time on the 968 so that I can tend to my '62 Mark 2 Jag, which can always provide a diversion. Thanks, guys.