New to this site. Moved to a different home in Aug and has a Harman Accentra-2 Pellet stove. Gave it a good cleaning before using. Within the last couple weeks it started to make a high pitched squealing sound when the auger engages. I've cleaned the burn pot for carbon build up. It seems like the sound appears when the auger is in the same position of its turn. Opened the back cover where the chain drive is and the noise is more noticeable but can't pinpoint. Are there bearings with the chain drive/auger that need to be lubricated? Could there be carbon further up in the auger tube? Greatly appreciate any suggestions.