Blower / Fan Whistling Noise

Dan2394

New Member
Hi

I’ve recently bought at 2017 Audi A5.

I had kept the blowers on the lowest setting until the other day, I turned them to the second or third setting and maybe half and hour later it started making a whistling noise.

To get the whistling to stop I have to turn the setting up and down until it goes back to normal.

If anyone knows what’s causing this or has any ideas could you please let me know.

Thanks
 
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