Arrrrrr! now I have to replace the convection fan. There is two sealed bearing on the spindle and one of them is making noise (enough to bother me). No wonder people sell these after a season or 2. Good thing I don't mind getting my hands dirty because I have put a lot of time into cleaning, tightening down loose parts, adjusting parts, Replacing a combustion fan and now this! The convection fan comes apart very easily into its component part..pulled the squirrel cages off and unbolt the engine from the frame. The sealed bearing must be press onto the spindle some how...too bad I don't know much about this because I bet all I have to do is pop the bearing off and somehow replace them by pressing them onto the spindle. I wish I took a shop class in high school..it would come in handy now. So I guess I'll have to buy the whole damn unit from the dealer $$$.