When ever i turn on the fan, or whenever it kicks in automatically, there is a fluttering noise from the right side behind the dash. It usually happens when i just turn on the car and it goes on for about 10 min mabey less then goes away. I have no idea what it is. Any ideas? Thanks Jim

 

You mean behind the dash in front of the passenger?

If so, that's where the cabin filters are. Have you changed them recently?

 

I've heard this fluttering sound for several years. Took it to the dealership (bunch of thieves) and they said that "we can't hear anything". Must be deaf. I wish I had written to Acura about it at the time.
I may take a look at these cabin filters....