Well maybe you can fix the Ford and my Chevy 2005 2500hd. Sometimes when you crank it up the ac blows hot. I don't care how long it sits or how much you rev it up it blows hot until you start to drive. When you start driving it turns cool in just a few seconds. Always blows cold once it starts. Chevy replaced the accuator valve and it worked normal last summer, but has started doing this again.