My Corsa, 09 plate has an issue with the air direction button. The heat button (cold to hot) works fine and the correct temperature comes out, and the blow speed is also working fine but the direction knob got a bit stuff earlier, it now is stuck on the first 2 settings (on the left of the circle) I think it's face - feet, however the air is coming only through the screen jets.
I can twist between the first 2 settings but it is making a much louder noise than usual!
Please help! Sorry about my basic explanations but I have no idea what the technical names are for things!