If you don't have any other power supplies sitting around to pilfer from, you can get thermistors for dirt cheap from Digikey or Amazon. I replace the blown thermistor on this 200w 24v power supply from a TV power supply because I didn't want to wait for shipping.
This 200w power supply is found in too many things to list, but a short one starts with CTC bizer, Flashforge Creator, Monoprice replicator...you get the idea.
As for as the repair goes, I have ran the printer for another 100 hours and it is still ticking, I need to replace that fan.
