I have a 2004 or so Mt Vernon stand alone pellet stove. It hase been flawless untill I cleaned it and fired it up the first time this fall. Since then I have been experiencing intermittent premature shutdown usually after it goes through the correct startup procedure. After much trouble shooting and some tech help from the dealer and Quadrafire tech support I saw what I think was the problem. My auger motor will switch directions on me. If I grab the motor and wiggle it in between pulses I can sometimes get it to reverse back again. My dealer said the diode in the motor wiring harness is there to keep that from happening. I spent the afternoon driving to get the new motor wiring harness and a new snap disk #2 200 deg (old one was 175 deg). Neither seemed to help. Anyone have any ideas? I heat my whole 3200 sq ft house with 2 stoves, the Mt Vernon upstairs and the Santa Fe downstairs. Both self ignite and are connected to programmable thermostats. Other than adding pellets, scraping off the clinkers once a day and cleaning every month or so it is almost as easy as running an electric furnace. Just need to figure out this auger situation!