Hi I am hearing a noise when the stove is feeding pellets. The stove is new and only ran 4 bags of pellets through it it just started to make the noise it sounds like a bubble then you hear the pellets drop and then it sounds like a gear is grinding but it is a low sound. I know it is hard to explain a sound but maybe someone has had this problem before. I was thinking it is the pellets getting stuck in the feed belt but not sure thanks