I have a question for any harman p-38 owners. Installed our stove in Sept, and we have this annoying, excessive loud buzzing/grinding noise every time the motor turns the auger. The noise is much louder than the fan. The dealer came out & replaced the motor, but no change in the noise. He stated that little to nothing could be done to fix this problem. The noise can be heard throughout the house & even downstairs. Is this normal for a p-38, and if not, is there a fix for this?