I have a 2008 Alfa and dI live in Phoenix. I bought it 3 years ago and I had the same problem. In phoenix in June 90 degrees occurs around 9:00am. My Alfa A/C never did cool to the point where it was comfortable. After about 3 months of this I had a Dometic roof top installed and it completely solved our problem. I had it installed at Alfateers in Fontana, California.