In today’s modern vehicles it is considered normal for the engine cooling fan to keep running for a few minutes after you turn off the car.
The cooling fan or fans are mounted right behind the radiator which is at the front of the vehicle behind the front grill. Here is a picture of the cooling fans that stay on, when you turn off the car.
In fact, in some vehicles, the fan may run up to five minutes and sometimes longer.
When the engine is running; the coolant circulates from the engine and flows to the radiator where heat is dissipated. When the engine is turned off, the coolant doesn't circulate, and the heat stays trapped therefore prolonging the engine from cooling. Running cooling fans help cool down the engine even after you turn off car.
If your cooling fan runs for over 15 minutes after turning off the engine, you may have a problem that needs to be fixed. Here are some possibilities causing the fan to stay running longer.
If the fan continues to run for more than 30 minutes; disconnect the negative side of the battery cable to prevent the battery from being drained.
If the fan turns off, that means the relay is at fault.
Furthermore, check for low coolant level and possible leaks that may be causing it. Usually, low coolant will equate to a hotter engine, therefore, it will activate the fan more often.