No cold air when you unhooked the arm from the lever, Dave??? The door (labeled #1 in the attached pic) maybe the problem. The blue lever (controlled by the motor) moves this door to select cold vs. hot air. Ok, with the rear A/C to on position, rotate the blue lever (counterclockwise, I believe) and check if you get cold air from upper vents. Rotating the lever should cause the air to switch between cold and hot, unless of course the door is stuck in hot air position. Please, try this and post back the result. It's summer and we got to get you cold air, you know!
Good luck.
