I purchased my home a couple of months ago and it has a Quadrafire Pioneer III. I have had several fires in the stove and the actual burning seems to go pretty well. I can't for the life of me figure out how the thermostat works (or if it does) and how the fan comes on... I have tried the thermostat at a high temperature and at a low temperature and it doesn't seem to make any difference in the operation of the fireplace. The next thing is the fan. It appears to work off of one of the thermocouples/heat sensors. There are two wires running out from the circuit board that are metal wrapped. I'm thinking they must go to a heat sensor. Anyway, the fan comes on after the firebox gets hot, though it sure doesn't seem consistent. Then it may run for a half hour to an hour, then it will turn off, then back on a while later... I think the first few times I had a fire the fan kept operating until the unit cooled down, but it goes on and off now. (not short on/off, but maybe 1/2 hour on, then off) The box is hotter than heck and may have a good fire going or good bed of coals. Does this sound like a circuit board problem, thermostat problem or ? Thanks in advance for any feedback. Oh... the local dealer retired and shut down his business... I'd also take any recommendations of someone to call.