Today the dealer fixed a few minor problems and replaced the A/C blower on my '12 Mustang but it still makes noise (maybe even be worst than the original). I had asked for them not to change it since I noticed it in another Mustang but they did it anyway.. oh well. I'm trying to find a fix for it. The sound is coming from the round area that I pointed to. If I place my finger over it, covering it completely the sound stops. It would be obvious to put some electrical tape over it but I don't know if that hole is necessary. Would love to contact the manufacturer of the part but have not been able to find out who that is yet. Do you guys have any ideas? Thanks!

 

I have this same issue, were you ever able to fix it? Did you try taping it?