Noisy Fan (Climate Control)

Hi All,
My fan has started to send out a grating noise. Does anybody know where this is located? Is it behind the centre console (hope so) or do I need to take off the entire dashboard to get it. Does anybody maybe have some pics or instructions of how to best get at it. I hope it is just some rubbish or something that has gotten into it.
Please help me.... I dont want to spend a fortune on labour in the garage !!
Will be a happy bunny for any help offered.