I would check to see if fans work by unpluging the sensor on the radiator and bridging the plug with a wire ,if they work then its the temp sensor in the rad thats gone. This : http://compare.ebay.co.uk/like/141003935455?var=lv&var=sbar&_lwgsi=y&cbt=y&device=c&adtype=pla&crdt=0&ff3=1&ff11=ICEP3.0.0&ff12=67&ff13=80&ff14=66