Radiator Fan Keeps Running when Car Is Off

Many car owners have experienced the frustrating scenario of their radiator fan turning on even when their car is off – and no one knows why. The fan seems to be running on its own, without any input from the driver. In this article, we’ll explore the reasons why a radiator fan might keep running even when your car is off, and provide some solutions to fix the problem.

What could be causing the fan to keep running even when your car is off?

If you’re noticing that your car’s radiator fan is running even when the car is off, there might be something blocking the fan’s normal flow of air. This could be something as simple as a piece of debris, or it could be something more serious like a clogged filter. If the problem is minor, you can try cleaning the obstruction and the fan’s housing with a vacuum cleaner. If the obstruction is more serious, you’ll need to take your car in for service.

How can you fix the issue?

When you turn your car off, the fan should stop running. However, if the fan keeps running even when the car is off, there may be an issue with the radiator. In this case, you’ll need to take your car in for repairs.


If your radiator fan keeps running even when the car is off, it may be due to a faulty thermostat. A faulty thermostat will open and close the radiator fan circuit constantly, even when the car is not being driven. If this happens, you’ll need to replace the thermostat.

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