Replaced the actuator, but the door only moves from closed (recirculation) to open. It seems like the motor would have to reverse direction to move the door back and forth. Any ideas about what might be going on? Thanks.
Asked and answered.
For some reason, I had picked up at the junkyard the plastic dashboard piece that surrounds the radio and holds the AC controls. All of those electronic pieces were still in place, so I swapped out the AC switch unit and -- ta-dah! -- the recirculation door now works just fine.