Why does the engine still make noise after the key is removed?

1 Answers
JohnnyFitz
07/29/25 7:11pm
Sound from the cooling fan. Below are the specific details: 1. High water temperature: In summer, even after the car is turned off, you may still hear noise from the engine compartment. This is usually because the thermal switch of the cooling fan detects high water temperature and automatically activates. When the water temperature exceeds 90 degrees, the thermal sensor triggers the cooling fan to turn on, lowering the water temperature. In winter, when temperatures are lower and the water temperature is also lower, the cooling fan generally does not turn on. 2. Check the coolant level: If the fan continues to run for a long time after parking and turning off the engine, first check if there is a shortage of coolant. If the coolant level is normal, then it is necessary to go to a repair shop to check for any faults in the circulation cooling pump or thermostat. 3. Engine overheating: When the vehicle is driven long distances or the water temperature is too high, the electric fan will not turn off immediately. If the engine is turned off while it is overheating, it could cause seizing. The fan will continue to work for a while until the water temperature drops before shutting off.
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