Another idea...see that pic of the vacume controller? Its near the gas pedal. Well on mine there is nylon arm that connects to that...that moves up and down depending what part of the car you are trying to heat/cool. That black nylon arm popped off the controller shaft. I put it back on by turning on the "vents"...I forget which setting I used...so that the shaft of the controller extended all the way out...then I snapped back on the nylon arm.
1995 Myst 2.0L auto