If your Liberty has a bad engine temp sensor the radiator fan won’t know to come on, because the ECU won’t know how hot the engine is. If it is getting 12+ volts, the fan should be coming on. There are usually two marks on it – a minimum and maximum level mark. Coolant Level. Automobile Association Developments Ltd. I can feel the fan blade is not directly attached to a motor because it can move freely without the motor on, but with some resistence. If it does end up being this sensor, they are very affordable. If the fan motor is not at fault, leave the ignition switched on, take the connections off the thermo-switch and briefly touch them together. The cooling fan motors work together with the cooling fan blades to pull air through the radiator. 6. The headlights and blinkers in the front work. But if it’s not, which means the fan has gone bad. Good luck!! 8L90E Specs, Performance, and Identification, TH400 Transmission Specs, ID, and Common Problems, Jeep Wrangler:  Radiator Fan Not Working Diagnosis, Jeep Commander:  Radiator Fan Not Working Diagnosis, Chevy Impala: Brake Lights Stuck On → Diagnosis. If the engine coolant level isn’t high enough to keep pressure in the engine it will run hot. © Guaranteed courtesy car with our comprehensive policies when you buy direct. It’s a serious issue and needs to be looked at by a garage. Once the temp gets so hot, the ECU commands the radiator fan to come on. If the fan is not working even when the car is heating up there might be a problem with the wiring. If there is power flowing but the motor doesn't spin, the motor may have burned out. 2. There are a few simple reasons that the fan would not be cycling on. Here is how to test if the fan is functioning properly: 1. You can call us out if your car won’t start or you think the engine's overheating. Jump to Latest Follow 1 - 7 of 7 Posts. You can test the voltage going from the fan relay to the fan itself. I let it cool then drove it down the road. It may cause the fan to cut in and out, or not come on at all. As soon as the pins are bridged, the fan should start to spin. The first thing that you would want to do is locate the fuse for your Liberty’s radiator fan and make sure that it hasn’t blown. But, there won’t be enough coolant to reach the temperature sensor. It is possible that a wire has worn out due to heat and needs replacement. Log in to see your policy documents, keep tabs on renewal dates and check your cover level. Your car's radiator holds coolant fluid for the motor to ensure that the motor doesn't overheat. If everything else seems to be fine, the fan clutch is the most likely cause of radiator fan … The fan is temperature-controlled to make sure that the engine gets enough cool air to avoid overheating. First, unplug the wiring connector. 2021, Even when the unexpected happens. :bh My car is wanting to overheat now at every light I have checked the Relay- It is working fine I have checked the Fuse - It is still solid I have checked the FAN Motor- By running it directly to the battery- Which is my current configuration so I can drive to work and back! The fuse under the dash is good and the motor is also good. If you're a Member with breakdown cover, call our Accident Assist team for help. Here are the most common reasons that your radiator fan does not turn on: Before poking your hands around your fan, make sure to treat it like it still could come on, and and keep your hands out of its path. Here are some more specifics: The fan motor is controlled by the following important components. If not, you have a fan or relay problem. If the motor that drives the fan is faulty, then a new motor will have to be fitted. If the cooling fan motor burns out, the cooling fans will then, in turn be disabled. When I popped the hood I noticed that the fans were not working. Reply. There are many reasons why your Jeep Liberty’s radiator fan is not working. If everything else seems on the up and up, the springs in the fan clutch have worn past the point of proper function and can no longer do their job. The fan clutch is the assembly that holds the radiator fan to the engine and makes it turn. The most common symptom of a faulty cooling fan motor are cooling fans that do not come on. If there’s an issue with the relay, the fan will be affected. The radiator fan motor is controlled by the PCM and a radiator fan switch. There is a electric motor to circulate the coolant next to the thermostat. Apply power and ground directly to the fan motor and see if it runs. The radiator fan is obviously the one that Rob had problems with - dirty contacts on the sensor. The first thing that you would want to do is locate the fuse for your Liberty’s radiator fan and make sure that it hasn’t blown. Bad Radiator Fan Motor. Your mechanic will look for one these common cooling fan faults: As the radiator fan is electrical, the problem could be with the fuse. If it does not, check to see that there is current flowing to the switch by using a … Radiator fan - at the front 2. The mechanic will check to see if all the wires to the fan are properly connected and in working order. And if it has stopped working, you’ll need a professional to repair it for you. new to this site,dont really know where it goes.but here it goes my fan isnt working.i just had this car for about 2 months. Through our vehicle checks and approved dealer network, AA Cars helps you buy with confidence. Fuses (both in the under hood fuse box and in-dash fuse box). It can happen. If your Liberty is running hot, and the fan is not running we’ve laid out the most common causes of this issue below. Honda Fans not working? It may cause the fan to cut in and out, or not come on at all. Your car’s manual should show where the fuse for the cooling system is. This helps to ensure that your motor is able to maintain a safe and stable temperature no matter how fast you’re driving or how hot external temperatures get. The fan wiring is some of the more vulnerable wiring in your Liberty. This could cause damage to your engine parts. Unless the wiring issue is fixed, the fuse will blow again. Although new cars are not immune to wiring problems, radiator fan failures due to issues with wiring are more likely to occur on older vehicles. See Contact Test in Step 1. Your engine temperature sensor is responsible for relaying your engine temp to the ECU. I dont really know what else to mess with, I debated just running a wire strait from the fuse box under the dash and put a manual switch to turn the fan on and off with bu But if you stop, for example in a traffic jam, your engine has to use an electric cooling fan to force air through the radiator. If you do have low coolant, don’t fill it up until the engine has cooled off. My radiator fan wont spin! To check the level, look for the coolant expansion tank in the engine bay. 2. 1 - 7 of 7 Posts. Here’s how to tell if your cooling fan isn’t working, what you should do about it and what the problem might be. 2) Flushed the radiator - still over heats. Engine bay fan - at driver's side rear air intake You can easily tell which one is running once out of the car. If the motor fails the blades will not be able to spin or generate air flow. If your cooling fan stops working, your engine could overheat. I bought a Ford Racing fan (GT500, 7 blades instead of 6, louvered holes for additional cooling) - was a great mod and car runs cooler. Long-term exposure to heat, vibration, moisture, and corrosion can cause connections to go bad, or wiring insulation to become brittle and flake off, leaving wires exposed. They are designed to only run when needed. Without the coolant hitting the sensor, the temp reading will be significantly lower than the actual engine temp. If the fan does not turn on, you will need to replace it.If the radiator fan is in working condition, move on to the next step. Hello all, my radiator fan is not working when it warms up. A yellow light probably means that the coolant level is low. If the fuse has gone, the mechanic will need to replace it right away. The fan relay controls the power to the cooling fan. The repeated radiator seam failure could be a coincidence (defective replacement), or it could be due to excessive pressure build up in … Many modern cars don't have a temperature gauge, but there'll be a light to tell you if the engine's overheating. The cooling fan relay is the relay that controls the engine’s cooling fans. If your engine coolant’s too low, it means that the cooling fan will have to work harder to keep the engine at a normal temperature. Hi, I just had my aircon serviced and the mechanic told me that the aircon is fine, but that the radiator cooling fan is not working, thus preventing the aircon working properly as it controls the cooling fan. This video from Ratchets and Wrenches is a phenomenal resource on how to properly diagnose a wiring problem. 1. Faulty wiring could be to blame. All aspects of the cooling system, from the fan to the thermostat to the radiator hoses, must be in good operating condition to ensure that the engine does not overheat, which can lead to a costly repair bill. Check the fuse(s) for the electric radiator fans. If you have had problems with your engine overheating, check your radiator fan and water pump. Radiator fan switch. If they're not, then there could be a wiring issue (e.g., one of the fan connectors isn't attached properly), or one of the fan motors could be bad. When you're driving, air flows through the car radiator to keep your engine a normal temperature. Fan Problems: Unusual noises are a good indication there is a problem with the fan itself. Enjoy discounts on restaurants, days out, car care and more. Most cooling fans use electric motors that have a moderate to high current draw, and as a result are commonly controlled using relays. Here are the most common reasons that your radiator fan does not turn on: Before poking your hands around your fan, make sure to treat it like it still could come on, and and keep your hands out of its path. Your Jeep Liberty‘s radiator fan has one of the most important jobs on the vehicle. If so, a replacement fan costs upwards of $45. Your Liberty’s radiator fan will not kick on. Let it cool down first. Unplug the radiator fan connector. Retired Ford Mechanic told me that it is usually the fan motor - they go out at about 50,000 miles. What causes radiator fan not working condition? Just because the radiator fan is not on does not mean that it is not working. However, when you come to a stop, or get stuck in stop and go traffic, you’re going to overheat. Wiring. Download the app to report and track a breakdown quickly, find Member benefits near you, and more. Tell us about your problem and track your rescue. A wiring issue. It is the last line of defense between you and an overheating engine. One way to check if fan is working at all is to turn on the AC. Your car’s cooling fan, or radiator fan, plays an important job in keeping your engine cool. 3) There is a radiator coolant temperature sensor below the fan on the passenger side. My radiator fan doesnt seem to be working. If it stops working, your engine could overheat and be damaged. If it’s scraping, wobbling, or grinding, it could indicate that the fan motor and fan blades are no longer connected. Is the noise is coming from the fan motor area ? Find a trusted garage and book, hassle-free, with Smart Care. Dan Ferrell (author) on May … It was fine. If the motor that drives the fan is faulty, then a new motor will have to be fitted. You need to inspect all the wiring leading into and out from the radiator fan. Log in to your account to book lessons, access your online learning material and recommend a friend. I went to the car wash today and left it ideling. On most modern cars, the cooling fan is controlled by the Engine Control Unit (ECU) which gets a signal from the coolant temperature sensor. Book hassle-free with Smart Care and get a 1 year guarantee. If the fan motor now works, the switch is faulty. Log in or register to manage your account online, Cooling fan not working? When I looked down at the temp gauge it was almost to the H mark. If there is anything that you would like to add, please leave a comment below. After that, the order isn’t so important. Adding coolant to a radiator dry enough not to trigger the engine temp sensor can cause problems from drastic temperature change. There are five causes of a radiator fan not working condition Blown fuse — electric radiator fans. A red light means that your engine's overheating. This should cut in after 20-30 mins of the engine just sitting idling. 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