A "radiator resistor fan" in a car is a component that controls the speed of the cooling fan by adjusting the electrical resistance, essentially acting as a variable resistor to allow for different fan speeds depending on the engine temperature, ensuring optimal cooling without unnecessary fan operation.
Key points about a radiator resistor fan:
Function:
It regulates the power supplied to the cooling fan motor, allowing for multiple fan speeds (low, medium, high) based on the engine temperature signal from the coolant temperature sensor.
How it works:
When the engine is relatively cool, the resistor provides higher resistance, causing the fan to run at a lower speed; as the engine heats up, the resistor reduces its resistance, allowing the fan to run at a higher speed to cool the engine more effectively.
Location:
Typically found near the radiator, connected to the cooling fan motor and the car's electrical system.
Issues with a faulty resistor:
If the resistor fails, the cooling fan may only operate at one speed (usually high), leading to potential overheating issues if the fan runs constantly or not at all depending on the failure mode.
What's in the box
1 x Resistor
