How have to this be stressed out? I do not know what is supposed by means of "fan" and "limit". I'm assuming that "fan" refers back to the blower at the range. But what's the restrict? I wager i just do not recognize what the thermostat is doing with 2 lines getting into/out of it. The yellow triangle categorised "2" in the diagram is any tool you need to show off whilst the temperature gets too excessive. The set up manual uses an oil burner for instance of this kind of tool. To your case you'd depart that switch unwired, unless you need to rig up a solenoid valve to douse your wooden fire. :).