2008 Screw 24000 miles. Took the truck to Ford 2 weeks ago due to A/C not blowing cold air. Fan clutch was replaced, A/C charged. Absolutly no change. Took back to Ford Wednesday, picked up today. They say nothing is wrong. Then why is the A/C operating intermittently and really not blowing cold air. The rental I was in put my truck to shame just as my toyota does. I know something isn't right here. I bought this truck new and notice any changes that occur. I'm at my witts end and am wondering do I take it to another dealer? Any help would be much appreciated.