Hello, I hope it is not serious. In any case, not all vehicles work at the same temperature, and the fundamental thing is to check the greatest amount of possibilities to determine where the failure is. Do not part of the radiator for more to be new controls that the water circulates through all the ducts. Surely he has the electro bulb, if you can control that he opens and closes at his corresponding temperature. Look that the electro garment at the corresponding speed. On the other hand, check that the water system does not have oil remains and that it works with the corresponding level. It can also raise the engine temperature an oil already in poor condition or a low level of it, do not forget that in addition to lubricating it is the one that carries the temperatures of the friction out. These are some things to keep in mind that you can do quietly I hope I have helped you a little. My greetings, good luck.