Hey guys, new to the forum hoping someone here can help out. I have a 2001 thelin gnome. The stove works great, but latley it will start up and burn for a random amount of time and all the sudden shut down filling the house full of smoke, unless i catch it and switch to off then back to fan. The pellet feed is woking fine, no obstructions in the vent pipe and the overheat red light isnt lit when it shuts down. Also the stove was on both low med and high during this shut down issue. Ive heard of a possible Negetive pressure sensor that could possibly need to be cleaned out? Idk if thats true with this stove or not. I bought this stove used 3 months ago, it get s cleaned out after each use.