2006 1.9 TDI

There is no air at all coming out of the centre dash vents even with all others closed. I think it may be connected to the fact that the 4 way selector for directing the air to the windscreen, face, feet etc seems to have no effect wherever it's set and all the air is directed at the windscreen and outside dash vents all the time.

Is this a setting problem or is a fix needed? I've only had the car for 1 week, 1st Golf etc so any help would be appreciated.