There is 4 different temp sensors in the VR6, most of which I toyed with at one time or another. I had issues with the thermo fans being on 100% all the time when running and for a long while after run (even if the car was only on for 30 seconds). In the end it turned out to be something to do with the preasure sensor in the AC which was replaced (along with most of the rest of the system), haven't had issues since then.