Hi, I am hoping someone can help with this question. We have a QuadraFire Classic Bay pellet stove. The other day when it went to start up there was a loud humming noise and nothing happened. The noise was coming from the exhaust blower. I took the blower motor out and cleaned the blades put it back in and it was working for a few hours then the same thing. When it starts humming if you take your finger and spin the end of the motor it will start just fine and work for a while. Does this mean the motor needs to be replaced or is there something else we can do to fix this? These motors are expensive! Thanks in advance for any advice…