Ok, so I have a Carrier Weathermaker 800 in my house that was rattling and running so loud that we couldn't hear anything. We had a guy come check it out and at first he said something was probably stuck, but couldn't find anything. Then he said we needed a new blower motor and wheel.
So today, it is whisper quiet and and working better than ever before. And I'm thoroughly confused. No work has been done. Any ideas?