Bought one of these a few weeks ago. Right out of the box the fan started sounding like it was having a issue running. Pitboss told me it was not right to sound that way. Said they would send a fan out. A few days later call and am told it was on Backorder. To return it for another one. Did that and still had the same issue. Spent some time on the phone with them with that one as well. Said it is normal. It still gets up to temp, just doesn’t seem right. Have seen a few people as of late have the same issue. It runs smooth once temp gets above 300. Other wise it just makes the strange noise. Its not the Auger fan it def is the combustion fan. Pulled the side cover off and watched it run as the noise was happening. Tried to upload the video. But the file is to big. Any input with the same issue, I would like to know what Pitboss has told you. I have seen its normal and others its not.