Not sure if anyone can help me with this but i`ll toss it out there anyway,maybe someone has seen this before. A few weeks ago one of the yellow and red lights have gone out on the control board as can be seen in the photos. I had turned it on then off and back on to prime the auger like the manual states. The stove still works. When I adjust the fan speed I can hear it chage speed for low,med and high. Same thing with the feed rate. I can`t be sure but it feels like it is putting out less heat now. Since I bought it second hand for $500 and control boards for this unit are around $300 I don`t want to put that kind of money into this dinosaur. I have recently done a cleaning even used the leaf blower trick. so I don`t think the heat output is related to a dirty stove issue.