A radiator fan motor is an electric motor that powers a cooling fan located behind or in front of the radiator in a vehicle's engine compartment. The primary function of the radiator fan motor is to help regulate the temperature of the engine by pulling air through the radiator to dissipate heat.
When a car's engine is running, it generates heat. The radiator helps to cool the engine by circulating coolant through its passages. However, when the car is not moving, there is no air flowing through the radiator to cool the coolant. This is where the radiator fan motor comes in. It pulls air through the radiator to dissipate heat, even when the car is not moving.
The radiator fan motor is typically controlled by a thermostatic switch or a computerized engine control system that turns the fan on and off depending on the temperature of the coolant. If the coolant temperature rises above a certain level, the switch or control system activates the fan motor to start pulling air through the radiator.
Overall, the radiator fan motor is a critical component in helping to maintain the proper operating temperature of a car's engine, and keeping it running smoothly.