I am curious, ever since I did the 1 ton cleaning my convention blower is louder. I am wondering If I got the fan blade out of balance. It is not terrible just something I noticed. I was not rough with it, just took a paint brush, and brushed off the fins, and under the fan the best I could. I took the blower out and spun the wheel, but It seemed ok. If the blower is not out of balance I wonder if I could of got dirt down inside the motor. It has been running ok for the past 3 weeks, but I think something is out of order! Mods please fix the title, I am not sure How I messed up the spelling that bad lol! Thanks!