Hello Well, it seems when running the unit on the high heat level setting, the Hi Limit Snap switch pops shutting down the stove at very inconvienent times like 4 AM ! lol Does anyone else have this problem beside the person in this thread? http://www.hearth.com/talk/threads/us-stove-5660-damper.78719/#post-1003621 Here is the information on the snap disc from the US Stove 5660 manual On Page 34 The heater will not operate when hot. Check the 200°F high limit switch. This switch is manually reset, check if it has tripped, if so let cool and reset switch. Check for cause of overheating, if switch trips again contact your local dealer for service. So after some research I found the The Hudson River Sarnac pellet stove and the Ashley AP5660 pellet stoves with the same identical shell use a 250 Deg F snap disc! I just ordered a 250 Deg F manual reset Hi Limit Switch for this stove from a place in Reno Nevada. http://catalog.selcoproducts.com/it...?&plpver=1001&origin=keyword&by=prod&filter=0 See Hi Limit switch in wire diagram from the Ashely AP5660 manual below!