A car radiator fan is to draw or blow airflow through the radiator core to remove excessive heat from the engine coolant when natural airflow from vehicle movement is insufficient.Core FunctionsRegulates temperature: Prevents the engine from overheating during idling, heavy traffic, or low-speed driving.Aids AC condenser: Often helps cool the air conditioning condenser located right next to or integrated with the radiator.Protects parts: Keeps engine operating temperatures stable to avoid warping, blown head gaskets, or total engine failure.