Originally Posted by RickU
My fan is pretty noisy (could be bearings) and, as I say, once it's on it doesn't want to switch off automatically. But I'm guessing I can fix both of those issues when I pull it apart this winter.
As you can see in my dissection of the blower, there are no bearings other then the motor itself. Maybe some lube in the motor. It is a 12VDC motor, reminds me of the motors in remote control cars. I have no idea where one could be found. The critical dimensions would be shaft diameter and length, mounting screw spacing, and length of the motor housing. Power consumption would be important as well.
When I turned it on, I was kinda impressed by how quiet it is.