Loud belt noise

[Got_Vnum]

Im getting a really loud belt noise (maybe the fanbelt?). Usually stops after the car has been running for a while but starts up again if I turn on the AC, then stops 2-5 seconds after switching the AC off. Im taking the car into DC Performance this week but wanted to know if anyone had ideas if its something I can check before taking it in. Could the belt be rubbing against something?

Thanks all

 

[Got_Vnum]

Turns out it was the tensioner.

 

[Vipermann1]

I knew it was the tensioner.

Now get back to work you lazy schmuck!!!