Hey everyone! I have a 2002 Sport Trac 4X4, 4.0L and cannot get the heater to work! With it being so hot here in Indiana until recently, I had not had to use it, but I can crank the dial all the way to full heat and it does not change temp at all in the cab?? I have checked to make sure the coolant is full, but that's about it. Was needing some advise on where to start... Thanks!!