This is probably an easy one for those of you that understand pellet stove technology better than I do. I have a Lopi Pioneer stove that is relatively new (purchased last December). In the last couple days I noticed that after running for several hours, the fire had gone out. The stove kept feeding pellets until the pot was filled. At some point the fault light came on. If I empty the pot and restart it seems to work fine again. Any ideas about what is causing this would be appreciated. If there is a problem I'd like to catch it under warranty. Thanks in advance.