Update! – I was playing around with this a few hours ago and wanted to prevent the fan from pulsing when close to the cut-off threshold. IE add in some hysteresis. I simply added a 220K ohm resistor between Pin 3 and 6 which gives it a few degrees of hysteresis. You can have more control over the hysteresis if you would like by putting in something like a 200-500K ohm trimpot between 3 and 6. the 220k ohm resistor gave about 0.5 degree Celsius of hysteresis. IE device triggering on at 45.8 would turn off at 45.3.