When the water temperature is too high impact diesel run the following reasons: 1. Radiator fan does not turn The easiest way to normal fan is running check the water tank is to open the refrigeration system, if the compressor has been started and the fans still run the fan must be faulty; when the water temperature sensor disconnect will in order to protect the engine and let the fan run on their own, for this The situation can be pulled out a water temperature sensor to be judged. 2. The radiator cooling efficiency This situation occurred in the summer, check just open the hood to observe whether the radiator is located behind the bumper mixed too much foreign matter, if it is too severe blockage radiator repair shop needs to be cleaned. 3. The thermostat does not open In this case, the coolant is not normal cycle, simply can not play a role in cooling, mainly it is room temperature water tank and return pipe (under normal circumstances should be hot), and since the inner pipe gas expansion, then up and down Water will become very hard. 4. insufficient coolant This is a relatively easy to observe the situation, simply open the engine compartment to observe the coolant level to meet the requirements. 5. The pump working poor Sometimes, because of the water pump belt prolonged use can produce skid, idling and other phenomena, when this problem occurs, the most important feature is depressing the throttle will return to normal after a period of time. 6. The water temperature sensors, meters and circuit anomalies