loud heater fan

[Nickyboy]

So a few weeks back I had the fan on maximum when defrosting the windscreen and it suddenly sounded like a Hercules C130 flying overhead. It's been like that ever since, any fan speed over the middle setting and you can really hear the extra noise. Any ideas?

[savvasa]

My 06 GTI sounds exactly the same! I almost feel ashamed of the noise when I have the heating on!

Any ideas?

[Poppa Dom]

Does it make the same noiuse when the a/c is off, as the demist screen automatically turns the a/c on. Does the sound disappear when you turn the a/c off - if so it is likely to be a gassing/compressor issue on the a/c system.

[Nickyboy]

Does it when you turn the fan speed up, whether HI or LO, and any direction i.e. windscreen, floor etc.

[savvasa]

Does it make the same noiuse when the a/c is off, as the demist screen automatically turns the a/c on. Does the sound disappear when you turn the a/c off - if so it is likely to be a gassing/compressor issue on the a/c system.

For me, it doesnt matter if the A/C is on or not, still sounds terrible... I didnt know that the demister turns on the A/C though, thanks for that.