got an issue ... Harman accentra freestanding ..2006 ...I replaced the auger motor last week( was clunking and plastic gears were toasted) , distribution blower a few weeks ago (was spent) ... running great but every once in awhile I hear this popping or clunk ....... I am wondering if the auger could be warped? or is this possibly due to longer pellets ? running new England hardwood ....