I have a 2012 passat 2.5 L and I'm having a strange problem.
the airflow at the vents stops after 15-20 min I'm driving the car.
It could be using AC or warming. It doesn't make difference.
and the blower fan you can hear it is working fine and increases the speed, but just very little flow coming out of the vents.
If I stop the car few minutes, like for refueling and having a coffee, then it works again most of the times.
but them after few minute of driving it had NO FLOW again...
Cabin filter is new!!!
what could it be?