I have noticed a bit of heat fluctuation in the Short Bus lately, and this morning on the way to the mine it got HOT. Like 245 degrees hot- normal operating temp is 192.

It got hottest at highway speeds, so it pointed to thermostat, and I want home and worked on arranging the toolbox as I waited for it to cool, and swapped out the stat, and sure enough it was stuck closed. I boiled that bugger for 20 minutes and it never opened.

A new one from Autozone was only $15, and as I always do, I bought and installed a failsafe. Took it out on a testrun after filling the system, and it stays rock steady at 192. I’ll take that.