Blower / Fan Whistling Noise


New Member

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.