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A cars radiator is a central part of the engines cooling system. Responsible for removal of heat from the engine coolant, the radiator system cools the liquid by allowing fresh external air to pass over a network of thin pipes, losing heat to the atmosphere.
A electric radiator fan is a key component of the cooling system which sits between the radiator and the bonnet grille. This fan blows fresh air across the radiators cores helping to cool the coolant.
A electric motor driven fan is controlled by a radiator temperature switch and motor relay to ensure the fan is activated when the coolant exceeds a specified temperature.
Issues with a electric radiator fan include worn motor, electrical issues such as wiring or fuses or damaged fan blades due to exposure to extreme temperatures. When working on an electric radiator fan care should be taken to ensure it does not automatically activate as the unit may start even with the engine and ignition switched off.