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If the engine water temperature is high, if the fuse is not burned, it is caused by the bad grounding of the fan plug or it has been ablated; the water temperature will be normal after the fault of the electronic fan is eliminated:
1. If the electric cooling fan does not run in time after the temperature of the engine coolant rises to the specified temperature, the temperature of the engine coolant will be too high, and even the water tank will boil;
2. For cars of different brands or cars of the same brand produced in different years, the control circuits of the electric cooling fans are not exactly the same. Therefore, when overhauling the failure of the electric cooling fan not rotating, you should refer to the maintenance manual of the model. diagnostic procedures;
3. The principle of the electric cooling fan control circuit of general models. The coolant temperature switch and the car air conditioner switch installed on the engine water channel or radiator jointly control the cooling fan motor through the relay. When the engine coolant temperature reaches the specified value or when the car air conditioner is turned on, the electric cooling fan motor will run.
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