im purchasing a 2001 f350 psd 7.3 the problem its having is the a/c blower motor is not turning on, the a/c is cold but only when the selector is on normal a/c but it only blows out when your driving. when its on max a/c it doesnt blow anything, im assuming its something to do with the blower or a resistor but if someone has had the same issue it may save me some trouble shooting thanks guys.