Why does the fan keep running after parking?
2 Answers
The reasons why the fan keeps running after parking: 1. The car's fan has a cooling function. When the coolant temperature is too high after parking, the vehicle's computer will automatically calculate the fan's speed and duration. The higher the temperature, the longer the fan runs to protect the engine; 2. If the fan continues to run even after the engine temperature has dropped, it may be due to a loose circuit connection. You can try disconnecting the fan's wiring harness for a separate power-off treatment; 3. A faulty coolant temperature sensor or a stuck fan relay contact may require replacement at a repair shop. If the fan still runs after turning off the engine, check whether it's normal cooling or a malfunction.
When I first started driving, I also encountered the situation where the fan kept running after parking, and I was worried that the car was broken. Later, a car-savvy friend told me that it's actually quite normal for the fan to continue running after the engine is turned off—it's a protective mechanism for the car to cool down automatically. The fan usually runs for a few minutes to dissipate heat, especially in summer or after a long drive. However, if it keeps running endlessly, say for more than ten minutes, then there's a problem. Common causes include insufficient coolant leading the system to mistakenly judge overheating, a faulty temperature sensor sending incorrect signals, or the fan itself being stuck with a relay failure preventing a complete power cut. The solution is to wait patiently for five minutes after turning off the engine. If the fan doesn’t stop, first check if the engine temperature gauge and coolant reservoir levels are normal. For serious cases, it’s recommended to visit a repair shop to inspect the circuit or control module. For daily driving, pay attention to regular maintenance of the cooling system—changing the coolant annually can prevent such minor issues.