Radiator Fan Not Working: Top 5 Causes And How To Check Them

A car’s radiator fan is not like the typical home radiator and plays an integral in the functioning of the vehicle. This is because this part prevents your car from overheating while driving. It comprises the cooling system of the car to ensure it works well. Here are the top 5 causes and how to check if the radiator fan not working so that you can get to the root of the problem quickly!

Is your car radiator fan not working? If so, you may be worried about the issue that is causing it and the costs of letting a mechanic check your vehicle. However, you don’t have to worry anymore.

The good news is that you can check and determine the causes yourself. Some of them are easy to fix and do not require you to hire a mechanic. 

If you’re wondering about the causes of the radiator fan not working, you no longer have to. Here is all you need to know about them.

Causes Of Car Radiator Fan Not Working

Radiator Fan Not Working: Top 5 Causes And How To Check Them

Here are the top causes you should check for when your vehicle radiator fan is not working:

1. Blown Fuse

A fuse is a small device that saves your car engine from severe damage when wiring stops working or when an electrical surge occurs. This is because the fuse blows and prevents high current from reaching the particular part. Thus, no damage takes place.

The best news is that a blown fuse is not a serious matter because changing it does not cost more than a few dollars. If your car’s radiator fan is not working, you should take out the manual and find the radiator fuse.

If the fuse is blown, you can replace it to see if the fan starts working again. However, keep in mind that in some cases blown fuse means there is an issue with the fan’s wiring.

2. Faulty Temperature Sensor

The system of many cars varies depending on the model and make. For example, some have fan control that works with the engine control unit. Meanwhile, others have a different module for the radiator.

No matter which system your car has, there is one common thing in all scenarios. It is that every vehicle has a temperature sensor that signals the radiator fan to start working.

If the temperature sensor of your car is broken or not working correctly, it means the radiator fan would not know when to start. This is one of the reasons why it may not be working.

You can quickly check for the temperature sensor by locating it through the manual. After that, you should check its resistance using a multimeter device. If the value is not within the expected range, the sensor is faulty and requires replacement.

3. Wiring Issues

A radiator fan stops working for various reasons, and one of the top ones includes wiring issues. In vehicles, connections play an integral role in smooth functioning. 

The wires of a car can corrode over the years, due to which they may not work correctly. If that is the case with your vehicle, you will have to get them replaced through a mechanic. To check for corrosion, you must look at the connector plugs.

Meanwhile, another way to find wiring issues is by testing them with a multimeter. Unfortunately, the method is not very effective in finding out the problem. However, you can use the device to see if the electric power reaches the radiator fan. If it does not, it means that there is a problem with the wiring.

4. Low Coolant Level

A coolant is a liquid that allows the radiator fan to work properly. Every driver must refill the levels before the coolant runs out. This is because not doing so will result in your vehicle overheating. The worst-case scenario is that your engine will seize.

You should keep in mind that once your engine seizes, your vehicle will not start again. If you want your car to work again, you will have to spend thousands of dollars. Many people prefer to buy a new vehicle over getting their seized engine fixed. This is because of the repair costs.

5. Broken Fan

A radiator fan may stop working because of its own fault as well. This piece of equipment has a motor that degrades over time. Eventually, when the motor stops working, your fan will not switch on.

The best way to check if there is a fault with the fan is by putting the AC of the vehicle to maximum level. Typically, doing so causes the radiator fan to start working. You can check this by standing near the open hood and listening to the sound.

In some cars, the engine sound is quiet, so you will have to use an alternative method. One way to check the motor is by running a test using a battery wire.

Radiator Fan Not Working: Frequently Asked Questions

Here are the top questions that you may be wondering about if your radiator fan is not working:

Can You Use Your Vehicle When Radiator Fan Not Working?

When a radiator fan stops functioning, it does not mean that you cannot use your car. However, you should avoid doing so, or you will permanently damage your vehicle’s engine and cause it to seize.

Besides that, your car will start to overheat promptly when the radiator fan stops working. As a result, you will have to wait for it to cool down before restarting your journey.

How Much Time Does Replacing A Radiator Fan Takes?

Replacing the equipment requires effort and time, depending on the cause. If you hire a professional mechanic, it will not take more than three hours for a replacement.

However, sometimes more time may be required due to additional services. For example, if the fan is broken, the mechanic will have to buy a new one and then install it.

Final Words

That was your complete guide to the car radiator fan not working. If you are suffering from this issue, you must diagnose the problem promptly. To save time, you can take your vehicle to the mechanic. They will find the issue and fix it in no time.

You can also check: What Does D3 Mean In A Car?

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