Why is Your Car Radiator Fan Not Running?

The automotive water fan is an important component that enhances the engine's cooling capacity. But what happens if this component stops working? How should it be handled? The following article from Huynh Chau automotive lubricant distributor will help you better understand this issue.

Image compiled by Huynh Chau

See also:

• Everything you need to know about automotive engine coolant
• Guide to DIY automotive engine oil changes
• Can overfilling automotive engine oil cause serious problems?

The automotive water fan not running can be caused by various factors

1. What is an automotive water fan?

An automotive water fan is a component responsible for increasing the speed of air circulation through the radiator (pushing hot air out while drawing cool air in). This helps the engine cool down more effectively. When operating, the water fan pushes and pulls air through the radiator.

Unlike the lubrication system (which immediately pumps oil to the vehicle upon engine startup), the water fan typically does not run immediately when you start the car. Instead, this component is activated through two mechanisms as follows:

• Operating based on a thermostat controller: When the coolant heats to a certain temperature and the engine reaches sufficient RPM, the water fan will rotate.
• Operating based on an electrical system: When the coolant reaches a temperature threshold, an electrical relay switch automatically turns on, causing the water fan to rotate.

The water radiator fan is responsible for accelerating air circulation through the radiator

2. What is the function of an automotive water fan?

In fact, many customers have visited Huynh Chau's automotive lubricant distributor in Hanoi and asked about this issue. With this article, we will provide you with the most complete answer to your questions.

In reality, the water fan plays a very important role, directly affecting the lifespan and operating performance of your vehicle. During vehicle operation, excess heat is generated from fuel combustion and friction between components. When the engine becomes too hot, the water fan works together with coolant to increase the vehicle's heat dissipation efficiency.

The fan's rotation speed typically depends on the temperature level and engine speed. The hotter the engine or the higher the engine RPM, the faster the fan will spin, and vice versa.

3. Why does the water fan not run or make very loud noises?

Any machinery or automotive parts can wear out and become