I have a Gen 1 Timberline 1300, so I can't say for sure they are all the same, but my own experience: Traeger sent me a new controller, because with trying to re-program the Wifire, the whole thing died. to replace the controller, you HAVE to drop the panel under the hopper, which Traeger never tells you. the wires over to the hotrod (yes, you are right, purple/white) are tightly tie-wrapped under the hopper. to replace the controller, you have to release all the tie-wraps, and then hook them up again, to keep the fan from hitting them under the hopper. HOWEVER, what I did was pull on the purple/white wire to get enough slack to install the new controller. when it was all back together, it didn't light, because he hotrod was "dead". When I unhooked the firepot/hot rod assembly and pulled it out into the pit, I found another purple/white connection in the middle of the tube that had become unplugged because I had pulled on it. unless you release all the tie-wraps in the purple/white wires, there will be tension on that connection, which s buried it the tube, and may cause it to become unplugged. Once I found it, I taped it so that it wouldn't happen again. have not seen Traeger even mention this, but it s obviously to make it easier to replace/install the hot/rod-fire pot.