I put a new auger motor on my unit because the old one finally crapped out. The new motor makes a whining noise when my skytech thermostat calls for more pellets to up the temperature. Its not really loud but noticible. It doesnt make the noise when the stove is low but as soon as it goes up to high to up the temp and dumps a lot of pellets in the auger I can hear it. It sounds like when you put an electric motor under a load or stess the motor. Just wondering if its normal. Thanks