Okay, this stove is 7 years old and has had A LOT of use where I live up in Vermont. Lately the large room blower has been making A LOT of noise...it honestly sounds like some terrible screeching. It happens only on initial start up and after it gets going maybe 2-3 minutes later it gets quieter and quieter. my local pellet stove tech said if my room blower fan is really loud on start up that it could be the motor is close to being blown and I'd need a new fan blower unit (part #PU-4C447). This was found because my stove blew a fuse the other night and he said if that blower fan motor isn't operating right it could be drawing more juice from the circuit control panel and blowing the fuse. I've looked online for replacement units and they range all the way from $78 to $180. One of the more expensive motors warned that there were other cheaper motors on eBay but that they were PSC (permanent split capacitor) motors and could have circuit board compatibility issues involving the blower speed control...is this true? Does it make sense? Unfortunately you can't just replace the motor on this unit as the motor and fan are in one sealed unit. One thing I did notice is that the higher dollar fans listed the CFM's at 250 which is in accordance with the OEM blower units but the cheaper ones listed theirs at 273CFM...would that make a difference? Not really looking to dump a bunch of money into the stove at the end of heating season but there are still a few cold nights in the long range forecast so to tempt fate and have my blower motor give up the ghost and be left with no heat (the pellets stove is my primary heat source) would be a very bad thing for me!