2010 Corolla Automatic Features

There’s almost always a limit switch temp sensor to keep the evaporator from icing up.
So pretty much any vehicle will start to lose use of the AC system around 32?F.

Not that I’ve observed, and that’s why I’ve just left them in the on position. Maybe that extra 30 seconds and extra charging of my ipod will wear the battery down quicker, but I’m willing to take the chance.