Well now that its finally hot out, my A/C isn't working. It was fine a few months ago when I was in the Florida Keys, but when I turned it on recently I get no cold air! Its a 14' JKU with 40,800 miles. The last thing done to it was thermostat was replaced and the system was flushed at the dealer. I hoping for something simple or obvious, but I'm no mechanic. Any ideas would be great. Thanks in advance, Joe.