My first car was an old El Camino with no heat. I kept a small fishbowl with a candle in it. Set it on the dash to defrost the windshield and then on the seat to alternately warm hands. Four New England winters like that.
@jac04 I agree on the auto mode. Heck I don’t like the temp settings. Sometimes you just want a little heat or a/c regardless of the temperatures. I guess that I’m just old and liked ‘low’ and ‘high’ as options, even fan off but still some circulation from draft.