I have an issue where the dial that controls the air flow, doesn't seem to want to turn to it's full extent in either direction. We tried to demist the screen for the first time today and when turned it to the screen position it sort of bounces back and doesn't engage to blow on the screen.

All the other positions seem to work and change flow, but then we get the same issue when turning it to the left, it bounces back slightly and wont stay located on that position.

Any Ideas chaps??

Yep, do it again a few times, it'll get the hang of what you want! Mine did the same. Don't bet on the pics being in the right place for the control, watch and feel!

Ok just been out to it and had another look, it seems i am getting airflow to the screen, BUT only through the passenger side vents, nothing through the drivers side which is a pain

Best use your heated windscreen then..... (gets hat on way out)