Hello, what's up with my temperature setting not working unless the fan is on. I leave the fan off on the highway, and cold air comes in the vents regardless of me pegging the dial to the hottest setting. I have the basic dials setup in my forester. If the fan is on any speed, the heat comes in as desired and set. If I turn off the fan and leave the vent open, I'll get cold outside air coming in. Does this not work like every other car in the world where temperature of the non-fanned vent can still be controlled?