I'm experiencing what I can only describe as a "whirling" noise coming from the passenger side heating/AC vent when the heat is on. The problem started immediately when a pile of snow crashed down the windshield from my roof. I checked the cabin filter, and there is no debris in it that would make that noise, but when I pulled it out, it was very damp. The sound seems to be coming from that area though. Could something be lodged in the fan or something? Thanks in advance. I feel like I may have to have the dealer look into this, but if it could be a quick fix, I would definitely prefer that!