Hi, When I drive my car, the fans doesn't have to work because there is a sufficiency of air flow, the fans start only when I'm stopped with engine running. Of course, you must check everything said in previous mails, but did you check if you have some tartar in your radiator? Perhaps the cooling system can't use all the surface of the radiator, so it could explain why your engine overheat. Best regards, VIEIRA Christophe. VIN#04271 / DL005. Luxembourg.