If your wire has worn out due to environmental factors, like heat, it will need a replacement. If the radiator fan is not working, it’s a serious problem.. Just because the radiator fan is not on does not mean that it is not working. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. The engine cooling fan has stopped working or the radiator’s cooling fins are clogged with debris so that the air flow that reduces the coolant temperature is restricted. 3. No check engine light. If this is the case, you could be dealing with a stuck-open thermostat – this means that there will be a continuous flow of coolant, causing a lower operating temperature. If your coolant level is low, then it might not feel as if your car is getting cool, even with the radiator fan turned on and working. The radiator fan does a very important job; it cools the radiator to stop the car from overheating. The fan might be on but newer engines can be very quiet, so you don’t hear them when you're sitting inside your vehicle. The sensor is usually located in the car thermostat cover. The fan relay will be under the hood. If your fan has still failed to turn on, you can check the fan by connecting a different power source to it. Check for any damage and clean the connector. Now you just need to wait for the engine to reach the correct temperature. Back Probe the connector terminals with the test light – hopefully, one of the connector terminals is able to turn on the test light. If the wire stretches, the wire link could be broken and you’ll need to replace it. A manual fan is connected to the engine drive pulleys and is controlled by a thermo fan clutch which senses radiator heat and engages when the engine is running at higher temperatures. 2. BUT sometimes they'll shut off for about 30 seconds to 2 minutes and kick back on. The radiator fan itself may be faulty. Here’s how to tell if your cooling fan isn’t working, what you should do about it and what the problem might be. Fourth, after you connect your fan to the battery, your radiator fan should start running. Replacement may be necessary if it’s not working right. They should be putting out around 12 volts of direct current. Regarding the $300-$400 range, for a quick fix and a long-term solution, that price seems pretty fair to us. All Rights Reserved. Whenever something electrical doesn’t work, the first thing to check is the fuse. There are a few common reasons why your radiator fan is not turning on. Thermostatically controlled motors do not work the fan until the engine coolant rises above normal operating temperature, and then switch off when it has cooled down again. If it is not, replace it immediately, and this should take care of the problem. The operating components in the cooling fan circuit include the cooling fan fuse, relay, coolant temperature sensor and the computer. Check your service manual to make sure exactly where the temperature sensor is on your car. Checked for battery at the blower, when the car is running. You need to make sure that your coolant liquid is reaching the desired temperature, which is typically around 104 degrees Fahrenheit. However, if there is an issue with the number of volts of electricity, then that usually means the wire needs to be replaced. Fortunately for you, the average cost of a radiator fan is not very expensive. If the radiator fan is not working correctly, your car can get damaged, and if you let it go too long without a repair, the fix can be thousands of dollars out of your pocket. If you’re moving, air will flow over the radiator and cool it down. Things i have checked and done so far: 1-Fan itself works when connected to power. When cruising, the vehicle moving through the air pushes air through the radiator, cooling the engine. 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