Originally Posted by ram350
Happened to me on my EXC and it was the thermo switch in the rad that wasn't working. Replaced under warranty and now works fine. You can double check the fan by connecting the two wires at the switch and the fan should run
Thought I'd post up that this did indeed solve my problem. Replaced the thermo switch hanging out of the radiator on the right side, no more getting hot, fan kicks on like it should. 10 minute fix, $20 part.
Thanks to Ram350 and the wisdom of the forum once again