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Message: <blockquote data-quote="Dennis" data-source="post: 2245159" data-attributes="member: 255191"><p>Hi. I'm having a 2003 Mazda 6 and experiencing a metallic rattling noise under the dashboard. The noise will come out only if the A/C is on. At first I thought that it was the blower fan motor (at the passenger side) making that irritating sound. I opened the hood while the engine and A/C is running to see if the sound is coming from the compressor, but its not from the compressor. I tried to run the A/C without the blower fan motor running (I pulled the supply for the fan) but the rattling noise is still there. So obviously its not the blower fan motor (correct me if I'm wrong). The thing is I noticed that the sound is coming from one assembly (center of the dashboard) behind the three A/C vents. Where is the sound coming from? Please help me.</p></blockquote><p></p>