Coolant in Petrol or Diesel Vehicles is cooled by radiators, Radiator Fan Runs Continuously. However, this cooling is not continuous. Only when the engine coolant, i.e., antifreeze water, reaches certain temperatures, the fans come into play to cool the engine. In case of a malfunction in this system, the radiator fan can run continuously, leading to several problems. Both the potential issues and solutions can be found in our article titled “Radiator Fan Running Continuously.”
Radiator Fan Runs Continuously
This indicates a definite malfunction. Radiator fans are usually dual-stage. When the motor temperature reaches a certain level, the first-stage fans come into play in a slow-turning manner. When the engine coolant temperature reaches high degrees, the second-stage fan, which turns at a higher speed and operates loudly, comes into play. If these fans continue to operate when the engine coolant temperature is at normal levels or below normal, there is a malfunction.
What Is the Fault and How Can It Be Fixed: Generally, this issue arises due to a faulty fan switch. If the fan switch mounted around the radiator fan hood is defective, the fans may remain continuously on. For detailed information about fan switch issues, we recommend checking our page on Fan Switch Failure.**
If the Fan Runs After the Car Is Turned Off
This is generally common in many vehicles and is normal. If the vehicle temperature is above normal levels when you turn it off, the water in the radiators continues to be cooled for a certain period. After waiting for a while at the front of your vehicle, you can see that the fan stops. This is not a fault. However, if the fan does not stop after turning off, there may be a malfunction.
If the Fan Runs Continuously When the AC Is On
This is also a normal situation. When the vehicle’s air conditioning is turned on, the necessary airflow to the air conditioning radiator is provided with a low-speed fan operation. Therefore, when you turn on the air conditioning, it is normal for the fans to continuously operate at low speed. If the fans continue to run when you turn off the air conditioning, or if they operate at a very high speed and loudly, there may be a malfunction.
What Happens If the Radiator Fan Runs Continuously
There is no immediate harm to the engine if the radiator fan runs continuously. However, the real damage occurs to the fan motor itself and the vehicle’s battery. Below, we have listed these damages, and we recommend that you take a look.
- Continuous operation of the fan(s) without the need causes the fan to overheat, burn, or malfunction, rendering the fan unable to work when necessary. This can lead to your vehicle overheating and causing damage to your engine.
- Continuous fan operation while the vehicle is stationary depletes your battery, potentially leaving you stranded. Continuous power draw from the battery without replacement can drain your battery.
Why Does the Radiator Fan Run Continuously
The electrical connection of the radiator fan is not continuous. Only when necessary, the current is supplied to the fan to make it rotate through a switch. The malfunction in this system, or the Fan Switch system, can cause continuous operation.
Although this problem may seem small, it is a problem that should not be neglected. If neglected, it has the potential to cause many different and costly malfunctions, as mentioned above. Therefore, we recommend that you consult a repair station without wasting time to solve the problem.
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Important Note: Write your fault as detailed as possible, specifying the brand and model of the vehicle when writing your questions in the comments or forum section. This is necessary for you to receive clearer answers. Therefore, try to write your questions in the comments or forum section as detailed as possible.