First, what are nothing to check if the electrventilator turns on when appropriate, that is, if it is activated at 90 but after this, if it does to the nineties and yet the vehicle is heated then you can suspect a problem with the ampake of the cylinder head, to check if it is the cutlery butt to realize some simple test The radiator or expansion deposit water is not contaminated with oil, then removes the lid from the radiator or expansion deposit if it is your radiator does not have a lid, and give the car to the car if it jumps water then the compression is escaping to the refrigeration system. Electro command is done by the computer, if this is the case you can perform a parallel installation that is cheaper than repairing the KE. Test and let us see how we continue.