Radiator Fan stays on when car is off
Aug 26, 2009, 05:52 AM
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Radiator Fan stays on when car is off
I have a 2009 Ralliart and the radiator fan stays on when I turn off the car. I tried to wait to see if it will turn off on its own, but after 5 minutes, I get impatient so I turn the car back on and then turn it off and then the fan turns off.
It doesn't happen all the time, maybe like once a week.
I called the dealer and the service rep said that sometimes the fan will stay on after the car has been turned off so that the engine will cool. I don't remember reading anything in the owners manual that this was a feature of the car.
Has anyone else experienced this?
It doesn't happen all the time, maybe like once a week.
I called the dealer and the service rep said that sometimes the fan will stay on after the car has been turned off so that the engine will cool. I don't remember reading anything in the owners manual that this was a feature of the car.
Has anyone else experienced this?
Aug 26, 2009, 06:22 AM
#4
It's part of the cooling system for the car. If you want it to go away quicker, open the hood and let it sit.
From a previous thread that this was brought up in:
It is very normal. I forget the exact physics and thermodynamics behind it, but in essence, whenever you drive a car, stop it, then drive it again for a very short distance and then stop it again, the engine coolant heats up in a way the car has to compensate for.
Think about it this way, you've just driven at 60 mph for an hour. Sure the car is producing a lot of heat, but there is a massive amount of airflow over the radiator. Now your car sits, all of the heat from the engine doesn't just disappear. Now, you start up the car after a very short period of time (the engine is still much hotter than when it was initially started), drive it a short distance, and there is almost no airflow over the radiator. The car senses this and engages the radiator fans in order to create airflow and dissipate the heat.
Think about it this way, you've just driven at 60 mph for an hour. Sure the car is producing a lot of heat, but there is a massive amount of airflow over the radiator. Now your car sits, all of the heat from the engine doesn't just disappear. Now, you start up the car after a very short period of time (the engine is still much hotter than when it was initially started), drive it a short distance, and there is almost no airflow over the radiator. The car senses this and engages the radiator fans in order to create airflow and dissipate the heat.
Aug 26, 2009, 07:25 AM
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you dont need tp turn on and off the car or even lift the hood. just TURN OFF THE A/C. thats all, turn off the A/C before you turn off the car. And it is in the manual
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Aug 26, 2009, 09:49 AM
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Oh yeah, the oil.
Well, it cools the radiator which in turns cooling the coolant that runs through the turbo.
I still think you need real air circulation for it to really cool. I don't understand why leaving the motor running cools things without any circulation.
Well, it cools the radiator which in turns cooling the coolant that runs through the turbo.
I still think you need real air circulation for it to really cool. I don't understand why leaving the motor running cools things without any circulation.
Aug 26, 2009, 10:31 AM
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when the motor was just running through the RPMs when you drive which raises the temp of the oil, letting the car idle for 2 min does cool down the motor even with out air circulation because the oil itself is circulating.
Aug 26, 2009, 06:01 PM
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