OK, I got in the car today and tried to start up the ol' AC and the fan speed control knob was set to high, so I tried to adjust it down and it was stuck. I gently jiggled the knob

and eventually it moved to a lower position, but there's no airflow in any other position but high. Wasn't there a recall about that problem? Anyway, now it won't blow on anything but high and it's quite annoying. Is there way to fix that or am I screwed?