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Why does the fan still run after the car is turned off?

1 Answers

Whitney

07/30/25 9:03am

The reason why the fan continues to run after the car is turned off: If the engine coolant temperature at the moment of parking is higher than the acceptable soak temperature of the engine, the vehicle's computer will automatically calculate the fan's operating speed and duration, thereby controlling the fan's operation automatically. The higher the engine temperature, the longer the fan runs after parking; when the engine coolant temperature drops below the soak temperature, the fan turns off. This mechanism protects the engine and extends its service life. More information about the car's electric fan is as follows: 1. Working principle: The car's electric fan is controlled by a thermostat. When the water temperature rises to the upper limit, the thermostat connects the power supply, and the fan starts working. When the water temperature drops to the lower limit, the thermostat disconnects the power supply, and the fan stops working. 2. Working requirements: The electric fan motor draws a large current during operation, requiring higher specifications for the wiring used.

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