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You need to remove the wooden panel, there are plenty of clips on you tube for this, but it's pretty easy. Once off check that the valves in the centre of the dash aren't blocked and that theymthey when you want to change the height of the airflow. Mine had a piece of foam sat on top of the...

Hi, I stumbled on this thread after experiencing the same problem on my new M3. But managed to find the bizarre cause of this! I new that the motors that control the valves for the vertical airstream were working as I could hear them moving when the fan was on 1. So it was either that both...