Thanks for the welcome! My warranty expired - count 'em - 33 days ago. But if there's a TSB out there, it should still be covered, shouldn't it?

Please point me to the thread if it already exists (I did a quick search and didn't find anything), but here is what's happening:Starting yesterday, I noticed a weird sound somewhere in the air vent system. It sounds like something banging around. There's no pattern to it, and (it might be my imagin...