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Why does the cooling fan keep running after the car is turned off?

1 Answers

AniyahFitz

07/30/25 10:14am

It is normal for the cooling fan to continue running even after the car key is removed. Generally, it will stop after a few minutes. The purpose of the cooling fan is to dissipate heat from the engine. If the relevant sensors detect that the engine temperature is high, the cooling fan will start running. Even if the car key is removed, the fan will continue to operate because it is controlled by the car's computer, and it will keep running until the engine temperature drops to an acceptable level. Here is some relevant information: 1. The fan is not controlled by the key. The power for the cooling fan comes directly from the battery. As long as the battery has power and the engine temperature remains high, the fan will automatically run until the temperature decreases. Additionally, some owners may notice that the fan continues to run after removing the key and then try restarting and turning off the engine, only to find that the fan stops. This happens because the temperature thresholds for the engine-off state and the driving state are different. 2. When using the car, it is important to monitor the coolant temperature regularly. If the temperature becomes abnormally high, it is necessary to replace the coolant in time to avoid unnecessary damage to the engine. It is also essential to clean debris from the radiator periodically, as this affects the radiator's cooling efficiency.

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