As I sat here one night & I noticed that my pellet stove had gone out. Bought & replaced convection fan. On the restart, the stove went through normal sequence. Convection fan turned on then stopped after a few minutes Replaced the snap disc next, and also pulled apart & cleaned the exhaust blower housing. Started unit, it went thru the sequence, and the same thing happened. Convection fan didn't even stay on for 3 minutes. Right now, and after almost 2 hours of it feeding and burning pellets, unit has not shut off to reveal maintenance code of 2, 4, or 6. Appreciate input...please. How long will this burn without convection fan???