If I unplug the 120 chord or switch it from inside ei take it off auto no lights then on the burner clicks and ignites and chimney feels warm and gets hot. No yellowish material inside the back covers and I also tried leaving it off for 12 hours then turning it on as far as cleaning I haven't looked at that a fan did kick on kinda noisy after the gas was on a half hour or so still no cooling inside though does the chimney come out the roof? Only other bit of info is we are living in it and we've been using it for a month now in 30 degree out door temps now it's finally warming up here 70 the last two days.
