Hello, I have been having problems for a while now in that my interior heat/cool fans that control the ventilation etc are causing rather nasty noises.

If I manually set the Climate to speed 1 or 2 or even 3, they behave normally but if I increase the speed to over speed 3, they grind and make very loud rubbing noises as if you are sticking a Bic Biro into an office desk fan.

The noise even occurs if on speeds 3 or below when the car is in motion and I do sharp turns left or right.

My question is, any ideas on what this may be and should I attempt to undo a few things both inside the car and under the bonnet to see if anything is obvious?

Thanks in advance

Kevin