England pellet stove. This unit worked great until it started going from burn to no burn and back to burn again. Augers have been cleaned and lubed. Fans have been removed and checked. Air intake and exhaust have been checked. If pellet are added manually it starts burning again sooner. I did notice the top auger slows when the stove is in no burn cycle and speeds up in burn cycle. Replaced auger same thing. Bottom auger turns constantly. At 4 this morning I came down, and the thing was in no burn but lots of smoke in the stove. When the door was opened the smoke dissapated and the pellets started burning. Checked the intake later this morning it was clear. Control panel shows nothing wrong, no codes, no start ups. What are the 3 buttons at the bottom of the panel for and how many setting do they have? Pontiac72