1 Auto Shop - Cooling Fan

*The engine cooling fan is designed to move air through the radiator when the vehicle is at slower speeds or stopped. This air flow removes heat from the coolant created by the engine using the radiator as a conductor. An engine cooling fan is temperature controlled to only run when needed. ** The AC condenser fan is designed to keep the condenser cool so that it can continue to efficiently convert the gas into liquid, and keep the AC system operating correctly. A defective fan can cause problems with the entire AC system. Usually the vehicle will display a few symptoms when the condenser fan has failed.