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Why is there a fan noise after parking a Tesla?

2 Answers

LucasMarie

07/24/25 12:48am

The fan in the car serves a cooling function. After parking, if the coolant temperature is too high, the vehicle's computer will automatically calculate the fan speed and duration. The higher the coolant temperature, the longer the fan will run to protect the engine, which is a normal phenomenon. If you notice the fan isn't running, you can follow these steps: 1. Check if the coolant temperature meets the requirement: Most car radiator fans nowadays operate based on electronic temperature control, so the fan will only start running when the internal temperature reaches the required level. If the temperature is too low, the radiator fan won't turn. Therefore, if the car radiator fan isn't working, first check if the coolant temperature meets the requirement. 2. Relay malfunction: If the coolant temperature is appropriate but the radiator fan still doesn't work, the issue might be with the fan relay. A faulty relay can prevent the radiator fan from operating. 3. Thermostat switch issue: If neither of the above issues is present, inspect the thermostat switch. This component can sometimes develop faults that affect the operation of the radiator fan, so it's important to check it as well.

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DeNorah

08/10/25 8:31pm

I've been driving a Tesla Model 3 for almost two years now, and it's quite common to hear the fan noise after parking, usually from the cooling system at work. Tesla is an electric vehicle that uses lithium-ion batteries, which are quite sensitive. If the car is still in a high-temperature state after parking, the fan will automatically start to cool the battery pack to prevent overheating damage. This is as normal as a person panting after exercise. Sometimes when the weather is hot or the car is exposed to the sun, the fan noise can be more noticeable. Software updates may also trigger the fan as the system checks electronic modules in the background. If the noise persists for several hours or sounds unusual, there might be an issue with the battery or sensors, and it's time to visit a service center. But generally, it's nothing to worry about—just get used to it. It's protecting the vehicle and extending its lifespan.

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