I have a same problem on my Contour GL 95 in Moscow.
When I turn on a/c(blower) on, it doesn't metter in which position (floor, panel or other), air is come into the cabin only through the openings near a windshield. I have try to understand why. I have find three vacuum dashpots which open three shutters (floor, panel and windshield). All of dashpots are connected with floppy pipes with electric-vacuum switch (middle switch on the panel)which turn on ventilator a/c and change the direction of airflow.
When I have disconnect this switch from pipes I understand that it should be vacuum in the black pipe. But there is not vacuum. That's why I can't change the direction of airflow. But it was so difficult to understand where this main vacuum line (black pipe) comes from (from under dashboard or from engine). Answer me please if you will deside your problem.
Sorry for my English. I'm from Russia.
