I just Bought 2001 Acura MDX, I hear clicking noises coming from behind dash board, its actually behind (CD player / Cassette player area), I went to Acura Dealer, from what he said, he wants to charge me $500 just to find the problem, I have a feeling its very small issue, but I can't figure it out, that noise sounds like rusted fan, it comes ON and OFF sometimes I don't hear it and sometimes is very loud, what behind this Area? does anyone had this problem before? any idea what to do? I hear this noise even when my A/C is Off...