Why My Radiator Fan Stays On After Car Is Off?

Do you know there is also a fan in your radiator that keeps cool the engine coolant? So that coolant gets ready to work again to cool the engine. They all are interconnected your coolant cools the engine. The coolant absorbs the heat from the engine and the radiator fan gives the air thrust to dissipate into the air. And again coolant is ready to cool the engine. If any part of the in this series gets breakdown then it creates a problem for your engine. So if there is a radiator fan problem this is your solution to the radiator fan stays on after car is off. 

Some Context First

The engine works as the power source for your engine. It is also interpreted as the motor that converts one form of energy into mechanical energy. Heat engines depend on the various thermodynamic condition to work. Internal combustion is one example of a heat engine. In which internal combustion of fuel rapidly motion. So what we have drawn from the engine is that is performance and provided things are of good quality then engine encounters with the performance. But if the Quality of products with the help of that we can achieve more performance. It also needs to be cooled to work properly and stop it from leading to the breakdown.

Why Radiator Fan Stays On After Car Is Off?

If your radiator fan stays on after car is off then it is not a very much complicated topic. It is normal these days because manufacturers are designing the radiator to work after the car turns off for a short- period so that your engine gets cooled enough. So now fans are electrically controlled to work with raising the temperature. And it keeps on not more than 20 minutes. 

If it is kept on for more than 20 minutes, then there is a problem with your radiator fan. Maybe there is any temperature sensor in your engine damaged. So that fan electric system gets false reding so it runs long after the car turns off. So, check all the sensors to get fixed your radiator fan. It needs to be fixed because it can drain your battery also and lead to damage to your engine. A damaged sensor also make your engine in trouble because it gives the false temperature of your engine.

Symptoms Of Bad Radiator Fan?

In modern cars mostly the radiator fan is controlled electrically. And many factors show the fault in your radiator fan.

1. Engine Running Hot

Engine exceeds the temperature drastically and if your fan not running well then it makes your engine get heat more and very easily. if notice that your engine runs hot or overheating then it may be the signs of a bad radiator fan.

2. Cooling Fans Do not Function

If it does not work then there is a problem with your radiator fan relay. Maybe there is no proper potential to run the fan. If the relay fails it stops the working of the radiator fan. it also causes the overheating of your engine.

3. Cooling Fans Stay On At All Times

It stays on after turning off your engine for a short period to cool the engine properly about 20 minutes not more than it. if it stays on continuously then there is a problem with your relay switch or maybe with the temperature sensor in your engine. That makes your engine run hot or overheats the engine.

Always use the assistance that helps you a lot to fix it without damaging other components. Also, You will get to know about every consequence easily. Or follow it step by step. Always remember In every situation stuck with the car, use a manual book that is provided with every single model of the vehicle to guide you with every component of your vehicle with its visual appearance. And that makes it easy to find anything.

Can You Drive The Car Without The Radiator Fan?

Yes, you can drive your car without a radiator fan. But you should never do that. Your vehicle’s coolant system is crucial and does not help your engine to cool down quickly and causes overheating.

How Does The Radiator Fan Turn On?

You know all the cooling systems in your engine are interconnected with each other. Also, reliable to each other. When the engine running at a low temperature then your radiator fan does not start yet. When the engine coolant temperature gets increased by more than 200 degrees Fahrenheit. So for running your radiator fan, you must require a temperature of more than 200 degrees Fahrenheit.

How Much Does Replacement Of Radiator Fan Cost?

It is a more expensive part of the vehicle. And also in some cars, there is only one radiator and on another hand, some use the two to just make efficient cooling for your engine coolant. So it costs you according to the number of radiators in your car. And replacement of the radiator fan costs you around 120 to 165 USD without the labor cost in it. After including the labor cost it will cost you around 400USD.


These are the main cause that generally harms the Transmission Shifting, and that is only controlled by the proper maintenance and scheduled services because “Regular Maintenance is the only Key”. These situations are very common these days and day by day. Consumption is increasing exponentially.

There is the possibility of manufacturing defects, so it is mandatory to always be punctual with the service logs of vehicles. This helps you to keep far from casualties because it is too low cost than repairing any part or replacement of that part. That makes you a good consumer and a good driver.

And I hope that after reading the whole article you will get to know about every cause. That leads to the radiator fan stays on after car is off and how they get fixed.

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