Please bear with me because I want to understand how this works. The HVAC sensor is inside the small vent near the sun roof controls. Air is drawn past it and flows down the curbside A-piller. The small motor drawing the air is located adjacent to the glove box.
Where does the air exit? Does it make any differerence if the passenger side air vent is closed? How much air flow should be expected, i.e. using the kleenex test?