Is Is a buzzing sound? A squealing sound? A hissing sound? Answer this and it will help to narrow down the problem
Not really a hiss or a squeal...more of a buzz. Almost just sounds like it always had...just a lot louder (maybe a rattle?). For what its worth, it is a Goodman unit, and I've read that they are loud units. It hasn't been loud up until this point, though.
