A few weeks ago I had a fire which toasted the inside of my box...Decided to take it to a repair shop. Heres what was found.. They did a more thorough cleaning than I did.... Culprit found at first was a blown fuse on circuit board...esp probe is good.... 2nd was a faulty exhaust blower motor....changed both...actaully got a Haraman exhaust motor for $103.00 locally not on line. fired it up and there is still a leak somewhere as the pellets were not burning up completely and I could see smoke from the plate/cover that is on underside of burn pot. The thumb screws on the bottom side of the burn pot which hold the plate on has always had 1 screw snapped off ( how i bought it) but it was always tight enough to hold plate on securely and air tight......since the fire the plate wont fit flush unless I get the screw out and put in a new one meaning it has to be drilled out and retapped...well..I think thats the last part of the puzzle...not how I want to do it but trying to avoid that part as it is in a difficult to reach location....hoping a high temp sealant on the edges of this plate will end the air leaks and create a better flame to burn off the pellets completely.