I’m kind of new to having a pellet stove. So I don’t know if this normal. My Castile insert is two years old and I’ve only burned about four tons through it. In the hopper on the left side, the sheet metal is staining. Or it could be getting discolored because of the pellets being poured in that area. I’m not really sure. Has anyone else seen this? I just want to make sure that something from the heat exchanger isn’t doing it from the the underside.
Thanks