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The cooling fan pulls air through the radiator when the engine is idling and air is not passing through the grille. This helps cool hot antifreeze so the engine doesn't overheat. Cooling fans are often activated by the computer to turn them on and off as needed, and may also be signaled by the coolant temperature sensor to ensure that operating temperature is maintained. Depending on your vehicle's make and model, you may have a single electric cooling fan that cools both the radiator and the A/C condenser, or dual fans with a dedicated fan that only operates when the A/C is running. With age and use, the cooling fan motor may wear out or fail electronically, causing overheating or warm air from the A/C system. If your vehicle has an active temperature warning light or a Check Engine light that indicates a problem with the cooling system, you may need to repair or replace your cooling fan. A failing cooling fan may not activate due to a failing relay or fuse as well, so check these components to determine the source of the problem before making your repair. Whether you need cooling fan parts, relays, or an entire cooling fan assembly for your vehicle repair, shop O'Reilly Auto Parts for a complete repair.