my stove goes through start up and then runs for 15 minutes or so. The pellets stop dropping. When the fire is almost out, it usually drops a few pellets, but its too late. The hopper fills up with unburnt pellets and it goes out. Sometimes the stove just goes out without dropping any pellets. Could this be issues with the t2 sensor going bad and detecting too much heat? I throughly clean everything in my thelin each week. my next plan is too take it apart and clean off my circuit boards and clean and check all insulation on the t1 and t2 sensors.