Quote Originally Posted by non-vtec View Post
Check your cabin filters. Most likey clogged na. You can blow compressed air to remove dust.
Correct, its just the cabin filter that is clogged and dirty. It also happened to me, the #2 fan setting is so weak and noisy., then I tried to remove the cabin filter and try it again, then the noise and weak air that comes out of of the vent gets back to normal. I suggest you replace the cabin filter.