Is It Normal for the Car Fan to Keep Running After the Engine Is Turned Off?

[ReaganMarie]

This is a normal phenomenon. If the engine coolant temperature at the moment of parking is higher than the acceptable soaking temperature for 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 will run after parking. When the engine coolant temperature drops below the soaking temperature, the fan will shut off to protect the engine and extend its service life. Below are common faults related to the car's cooling fan: 1. Whether the coolant temperature has reached the required level: Most car radiator fans operate based on electronic temperature control. Therefore, the fan will only start running normally when the coolant temperature inside the car reaches the required level. If the temperature is too low, the radiator fan will not operate. Thus, if your car's radiator fan fails to turn on, the first thing to check is whether the coolant temperature has met the requirement. 2. Relay malfunction: If the coolant temperature is appropriate but the car's radiator fan still does not work, the issue might lie with the fan's relay. A faulty relay can prevent the radiator fan from operating. 3. Issues with the temperature control switch: If neither of the above issues is present, then the temperature control switch should be inspected. Sometimes, faults in this component can also affect the operation of the car's radiator fan, so it is important to check this as well.