I leased a 2015 Optima 2 months ago and I am having problems with the AC. I turned it off last Sunday to open the windows and the sunroof and when I turned it back on, it started blowing but not cool air, I tried starting the car several times, drive around, switching the fuse box on and off, resetting the UVO system etc but nothing work. I took it to dealership on Monday and the guy at the desk checked it and it was blowing hot air but after a couple of hours came back and said that they couldn’t find anything wrong. I turned on the car and the AC was working, great I thought, but today I turned on the car and the AC is blowing but not cool air again, I had to drive to work with the windows wide open in the intense Florida heat. I later went to the car and turned it on and the AC is now working again. The car is new with only 1500 miles and they couldn’t find anything wrong with it, so it’s probably not a mechanical issue, so it might be a computer issue, something action that is triggering the on and off of the cool air from the AC. The problem is that I cannot recreate the problem for the mechanic to check, but I know that it will happen again in the near future and it sucks. Any Ideas? Suggestions?