Hi I have been having a few issues with my series 3 commodore Ute vs my thermo fan doesn't seem to auto engage it used to so what I have been doing is use the aircon to activate the fan when it gets warm now I noticed with the interior fan off and the AC button on the engine light comes on but this doesn't hapPen all the time I checked all the wiring changed coolant temp sensor just can't nut it out anyone have any ideas