I have a 25-PDV, 55-SHP22, 55-TRP22 built in 2008. Last year I replaced the Exhaust fan, the room blower, glass and door gaskets and the heat sensor and after using the stove for a couple of months it would start up, the room blower would start and then the top auger would quit. If I kept throwing pellets in the stove it would start feeding again eventually and after a while it would run fine until I shut it down to clean it and then I would have to do the same thing with code E1 if I didn't hand feed it pellets. Recently it would only feed until it got warm and the room blower would come on and it then would feed no more. I jumpered the vacuum switch and it worked ok. Since then I have cleaned the stove and exhaust entirely, removed the exhaust fan, cleaned and reinstalled, cleaned out the vacuum tube, replaced the vacuum switch and hose, sealed the exhaust joints with silicone and aluminum tape, checked the door seal with a bill, adjusted the lid hatches. Started right up, room fan started and then it quit feeding on the top auger. No codes.Today I replaced the auger motor as I thought it may be weak and like an old starter on a car it was getting hot and creating an open so it would stop. I also jumpered both vacuum switches and the lid switch, (not all at once), and replaced the aluminum intake hose in case it somehow got a hole in it. same thing, starts, blows then quits feeding. Again no codes. This stove has ran since November 2008 without a hitch other that a couple of auger motors. I am at a loss. I still have the old heat sensor but I didn't have the wrenches to install it. Checked the one on the stove and it is tight. Only thing I can think of that I didn't do today is the hose from the vacuum switch of the firebox which I neglected to check but wouldn't jumpering the switch take that out of the equation. Anyone have ANY answers?? Could it be the mainboard? Oh yeah, I checked the settings and they are 6 4 1.