I have a 2006 Quadra-fire Castile insert and until recently everything was fine. After figuring out why it is not turning on because of the thermal switch popped I came to the conclusion that it is feeding too many pellets into the burn pot and making too big of a flame. It gets too hot and the thermal switch pops again. I tried adjusting the control knob on the control box from 4 to 5 and that did not help. I cleaned out the fireplace and burn pot. I adjusted the door gasket (and ordered a new one). The flame is wicking all the way up to the cover plate. It is yellow orange and I feel unsafe at that big of a flame.