Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. A radiator fan is imperative in keeping the coolant’s temperature low enough to keep the passengers comfortable. This is a key reason why the radiator fan turns on when the car starts. © 2020 Cash Cars Buyer. The cooling fan comes on when I start the car and stays on for 5 minutes after I turn it off. It should test for continuity when engine cold. Your Volvo’s cooling fan, also known as the radiator fan, is an essential component of the cooling system in your vehicle. If you prefer to do some of the work yourself to save some money, you can actually troubleshoot a cooling fan to see where the problem lies and how to fix it. Turn the air conditioning to the maximum setting – this should spark the cooling fan to immediately come on. sensor, and radiator cup. Radiator Fan stays on. 2. Since the radiator fan motors are so important, you need to bring your car to a professional technician to diagnose and repair your parts to keep your vehicle safe and working conditions. Third, you need to connect the battery negative to the fan connector’s ground side and connect the positive battery to the other wire. As we mentioned before, the cooling system is a complex set of parts that helps to regulate the internal temperature of the engine to avoid overheating. When I turn my car off, the fan stays on for a few minutes before turning off. Mine does the same at times but hasn't in awhile. The radiator fan is positioned between the radiator and the engine and is in charge of cooling the car and keeping the occupants at a comfortable temperature level. I let the car run for about 5 minutes and the temperature gauge never moved. VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. This small structure can wear out after prolonged use. Check for any damage and clean the connector to get rid of any debris or contaminants. In a nutshell: The radiator fan comes on so the A/C works at its highest efficiency. Did you find out what the cause of the fan going at high speed? In order to figure out the reasons why your radiator fan turns on when the car starts, you need to know how it works, the function of the radiator fan, and the signs of a failing radiator fan. EGR Valve Replacement – What You Need To Know! Why does your Mini Cooper Fan stay on when I turn off the engine? 2008 track model with about 18,000km. This issue doesn't happen if engine is warm. You can always tell that something is wrong with your radiator fan not turning on when you start your car. The fan also works when the A/C is on. I was told that it was a faulty temperature sensor which I … The radiator fan is a crucial part of your car that is in charge of cooling the car and keeping the occupants at a normal temperature level. Mini Cooper fans are meant to boost the circulation of air around the radiator to ensure the engine cooling system is well cooled. If you need to confirm if it’s in working order or not, you should turn on your engine and let your vehicle idle. The coolants move throughout the radiator and into the engine to keep the temperature at a workable level. Ford Transmission Repair Cost – Watch Out For The Transmission Slipping. You can do this by listening and feeling if the radiator fan turns on when the car starts. Recently I noticed that after the car's been off for about 10-20 minutes, the radiator fan will start up and never stops on its own. 2 Posts . @johnblack I checked it while it is on cold state, but then when turn the AC ON the Radiator Fan turn on, so I let the AC ON while i drive my car, after 30mins driving if i turn the AC OFF, the RADIATOR FAN still dont work, even the Radiator Temp was hot. 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