I have a whitfield profile 20 that I bought a few months ago, and its never ending problems... First was that it would smoke my house up BAD, then once it stopped it would run ok, but a big tall lazy fire and would shut down 1-3 hrs later.. I had a local Lennox dealer come out to inspect it and "cleaned" it.. He then told me my exhaust blower was weak and I need to replace it.. We shut it off and cleaned it reinstalled it and it worked better then ran for 25 hrs.. Then I shut off... When I turned it back on a HUGE gas like explosion happend in the fire box. I called my dealer he then said the exhaust blower was out and to replace.. So I ordered a new one installed that and as soon as we plugged it into the wall the fan was kicked on... Then I was told the high limit switches need replaced.. So we replaced that and SAME problem the fan kicks on as soon as it's plugged in.. Left it running for a few mins nothing happens expect cool air blows out.. The auger is not feeding pellets and we are just so frustrated with this thing.... Checked the convection blower it's running checked the photo eye it's ok, check the pressure switch it's ok... Does this sound like a control board issue or wiring issue or what? Any ideas on what else to try or check?? I cant keep paying the guy at the store to come out...