air condition is blowing warm air

I have the same problem and found a shop that gave me an estimate at no charge, if you can believe that. He said the blend door is not opening and closing like it should, that it had a bad actuator. The glove box needed to be removed to fix it. Then there's another part that is square and fits into a square hole and if that part is broken, the entire dashboard needed to be removed. Worst case scenario, it could cost me as much as $600 to repair it. Needless to say, I'm looking forward to cooler weather. Please reply if you have found a solution, as it might help me out...