Well I tore into it today to figure it out. It appears that the output side bearing is gone. I removed the four bolts that hold the fan bracket to the back of the inspection panel and removed the fan. The blades were a little bit caked up with fly ash but nothing bad or unexpected. I was able to rock the fan blade from side to side. It wasn't excessive enough for the fan blade to come in contact with the metal bracket housing that is attached the the motor but it was very noticeable. So I removed the fan blade and the housing so that I could get down to just the motor itself. I went back outside to the furnace, plugged it in and through the bypass lever. The fan spun up and sounds like it is full of marbles. The noise doesn't change very much with the angle of the motor, horizontal or vertical, but goes away when it is almost wound all the way down when unplugged. The side to side movement of the shaft is less noticable when the fan blade isnt attached to show the side to side play that you get. I would say that fan motor is in need of replacement. Next question, I know electronics have a one year warranty on them, does that mean the new fan will have another 1 year warranty on it or is it from the purchase date of the stove? I am skeptical about the quality of the bearings Fasco is using.