My Quadrafire Castile freestanding stove has been acting up lately. Cleaned it out and noticed when I restarted it, the auger is making a buzzing noise. It doesn't make the noise when it first starts feeding before the fire starts. The noise starts after the green indicator light goes on and it starts the feed cycle. It gives about 5 or 6 quick pellet feeds then a long feed. This cycle continues like this throughout the burn. I guess its the normal feed cycle. The noise is evident very slightly during the quick feeds but more pronounced during the long feed(approx. 2 or 3 seconds). Its doesn't always make the noise. I emptied the hopper and tried to turn the auger by hand and it is tight. I ran it by pressing the reset button and it didn't make the noise. I have been monitoring the pellet feed and it seems like the quick feeds aren't always dropping pellets. Sometimes the stove shuts down due to lack of pellet feed(I think, because it usually happens overnight). I just ordered a new auger motor online, but wanted to check to see if I am doing the right thing by replacing the motor. The stove is 13 years old and the original auger motor.