Air Flows From Wrong Outlets
WARNING: This page is about a different car, the 1995 Ford RV Cutaway, 1995 Ford Econoline, 1995 Ford Cutaway, and 1995 Ford Club Wagon. However, it is still accessible from the selected car via links, so may be relevant.
Test vacuum check valve. Check for vacuum leaks and inoperative vacuum motor. Check for correct vacuum hose routing. See Figure .