CVO 8/26/2012The Mode Door Actuator controls the direction of airflow. It selects which way air flows through the different ducts. If your climate control system has lost the ability to control which vents the air comes out of, the MDA has probably failed. Both the ATC and MTC systems use this device.
Both failures can be seen by the climate control system's integrated diagnostics system.
wallypops 9/5/2012And my savana is vacuum activated and not servo motor actuated. Anyone got a diagram of where the door is, where the vacuum actuator is, and how to get at them?