Wanted to address this again. I know the sync 3 manual says if in auto it will keep the desired temperature. And according to those on here it will do heat or air to maintain that temperature. For nice cold air I've always set dual zone (68 to 70 degrees) set to auto and turned on the button that says air. My fan will fluctuate as its supposed to and will keep car nice and cold with cold air coming out of vents to my desired temperature I set. Ok so I tried what most say and just set as usual my dual zone temperature I wanted and turned on auto button and did not turn on the button that says air. And you could tell it was not blowing cold air. Air coming from vents felt like outside air would be and after driving the car for awhile it was just to muggy in there without ever cooling down. I then turned on the button that says air and the fan slowed down some and nice cold air started flowing into the car from vents just as I've always set it and fan as always has fluctuated speed since I had it in auto. You guys/gals sure if you want the air to work you don't have to not only put in auto (to maintain temp setting) with desired temperature setting but also turn on the button that says air. I have to.