Car Radiator Fan Not Working

Car Radiator Fan Not WorkingIn most cases, driving without a fan will cause the engine to overheat and eventually shut down. Radiator Fan Stopped Working/Car Overheating. With its first all-electric car, the i3, BMW seems to be gunning for a new type of electric car customer: people who don’t like electrics. If your Taurus 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. Then get under the car and pull the fan shroud out with both fans attached to it. Second, look at the wires and identify which ones are power wires and which ones are ground wires to avoid any confusion. Reasons your radiator fan isn't working. Saturday, July 21st, 2012 AT 9:44 PM It sounds like the cooling fan relay is not working. Maybe it comtrols multiple devices. The way the system is supposed to work is like this: after the engine is started, the thermostat on the …. Faulty Coolant Temperature Sensor. If the fans are still not working, then the issue is most likely that 3rd wire. Volvo S80 Radiator Fan Not Working. There are three ways to check for a bad terminal. I took the car to the dealer and they replaced the A/C pressure switch but that didn't fix the problem. The fan alone will cost between $350 and $500, with the labor adding the other $150 to $250. For this reason, many drivers will try to fix overheating by adding coolant to. was not sure witch one was the new one. 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. I’m after some information on how to diagnose why my fans dont come on when they should. My radiator fan wont turn on, on it's own. The most common causes of broken air conditioning are leaks or compressor issues. car cooling fan not working need. It pulls air through the radiator and has less impact on airflow at high speeds than a pusher fan since it is behind the radiator. Overheating + idling issue + radiator fan not working. Step 1: Locate the radiator cooling fan. Radiator Fan Not Working?: Good Morning, the Vehicle. radiator fan does not kick on. Radiator Fan Not Working? 7 Common Causes & How …. After that using a jumper wire plug one end into one of the hot sockets, the ones. Your radiator fan is not working because the fan motor is damaged, there’s a problem with the wiring, the fuse is blown, the temperature sensor is damaged, there’s …. Then all of a sudden it started blowing full blast, while the recirc, ac, rear defrost button lights all came on and were flashingthen it all turned off - 1996-2000 Honda Civic. Wires going to the control unit or along the fan relay can get corroded over time. The most common reasons a Nissan Versa radiator fan isn't working are the fan assembly, the fan clutch, or the coolant temperature sensor. Check it with a volt meter if you have one to make sure, if there is power, you are getting 12 volts. 1---- Start the engine, Desconnect the ECT Switch located on the Radiator, See if the Fan come ON. Here are some things to check if your car’s fan won’t turn off: 1. Radiator fan not running at operating temperature?. The radiator needs a constant flow of air through its core to cool it adequately. 7 Reasons Why Your Radiator Fan is Not Working 1. No I do not, but I can probably get one. Overheatingradiator fan not working : r/BmwTech. If it blows again after being replaced, this suggests a problem with the radiator fan motor. Jaguar XF, 3 litre diesel S, 2012, Portfolio, stratus. Radiator Fan Is Not Working and Car Is Overheating">Driver Side Radiator Fan Is Not Working and Car Is Overheating. The fan will not work if the radiator itself isn't up to temp while the temp on . The fan itself often uses a large fuse of around 50A, while there may …. How to Check if a Radiator Fan Is Working (Step. Open the hood and locate the radiator cooling fan. With no coolant in the radiator, your engine will overheat, causing. Verify the wiring going to the radiator fan from the relay or the control panel. Check by hearing for the fan to turn on. A signal from the coolant temperature sensor is what triggers the ECU to turn on the radiator fan, and if it's faulty, it can prevent the fan. The radiator cooling fan is an important part of the cooling system operation. Turned on the heater fan to lower temp and it came back down. Asked by DaleFarrand May 30, 2014 at 09:26 AM about the 2000 Buick Century Custom Sedan FWD. Then there's 3 10mm nuts holding the fans to the shroud. If the fan is spinning, the motor is fine. One of the most common reasons for car heaters not working, a faulty or damaged thermostat could actually lead to worse problems with your car. 30 mins or so In 105 heat no problems Come to a stop light from city driving still ac cold Out of no where (city driving) i hear ac clutch disengage, air starts blowing warm fan cuts off. The overheating that your wife experienced is most likely due to failing water pump. In my case at least, the thermostat opens around 186-188F and the fan will come on at 220F (provided the AC is not on). Cooling fan: definition, functions, components, working. So I checked out my problem with Eddy. Mechanic's Assistant: What is the model of your '09 Toyota? SE. But they will always run when the A/C is on. The motor and fan normally come off as an assembly, but you may. What Does Car Radiator Do? Definition, Parts, Function, Work, …. If you’re a fan of Bath and Body Works, you know how exciting it is to step into one of their stores and be surrounded by a wide array of delightful scents. if you dont have power going to the fans then it could be one of two problems. A coolant temperature sensor is an important component for regulating the engine’s temperature in modern cars. Cooling fan not going to high. This car shows two different sensor for temp. They are designed to only run when needed. The most common sign of a bad radiator fan is the car overheating during driving, especially on hot days. The most common symptom of a faulty cooling fan motor are cooling fans that do not come on. Any visible signs like broken blades indicate that a replacement is necessary. A radiator fan only turns on when the air conditioning system is switched on because the AC compressor requires additional cooling to prevent it from overheating. I haven't taken the time to do much more then gripe about the fan not working. Chevrolet Equinox radiator fan relay replacement cost is between $45 and $52. Cooling fans can stop working properly for a. I rev the car high for a few minutes and the fans don't turn on. Help with radiator cooling fans, not spinning, due to fan module?. First, there should be a small drain hose in the bottom of your air box. Engine & Tuning: Weapon R Intake|OBX TB Spacer. The TIPM replacement is easy because it self initializes. Nissan Versa Radiator Fan Not Working. Brianator answered 5 years ago. Radiator fans not working. I discovered my electric fan was not working on my 2000 328i (Manual). Your Suzuki SX4‘s radiator fan has one of the most important jobs on the vehicle. Engine thermostat is stuck OPEN (engine never gets hot enough to turn on the fan) Faulty fan re. How to Check a Radiator Fan. Turned the car on, blasted my AC and the sweet sweet loud sound of the radiator fan was like music to my ears. When vehicle reaches a certain temperature the switch closes and one fan turns on. So when it is not reading, the radiator fan won’t start. Cam was installed and car was tuned. If it doesn't, the motor is likely burnt out. Disconnect the H2Opump temp sensor, and describe what happens this time. -Small fan is not working at all; Havent tried to measure voltage to it. If the fans do not come on then you will see the. If those seem to be ok, run a hot wire to the fan and see if it will turn on. This article will discuss whether you drive your car if the fan is not working, possible causes of a faulty radiator. Radiator Fan Not Working : Most of the cars in the modern era use an electric fan to pull the air through the radiator at idle and at low speeds. A main cooling fan, for the radiator. If there is an electrical surge going toward a 2. The radiator fans have three different relays in the relay box in the engine compartment and they are all controlled by the Engine Control Module (ECM). 7 Reasons Why Your Car Temperature Gauge Stays on Cold. The cooling fan relay is an electromagnetic switch that controls the power supply to the engine’s cooling fans. Re: Radiator fan not working! The fan will come on when the coolant reaches 226 degrees, which is literally a hair away from the red zone on the guage. Because that time relay coil supply not reached why I do not know. To determine whether the fuse is blown, you should find the fan fuse and test it. If there is no power to the cooling fan, then check the fuses and see if they are burned. Make sure that the lower radiator hose gets hot. If one of the fans is not working then none of them is working. If this is not the issue the temperature sensor or ECU may have a problem. The most common reasons a Chevrolet Trax radiator fan isn't working are the fan assembly, the fan clutch, or the coolant temperature sensor. When I turn the A/C on, the fan comes on intermittently which make me think the engine coolant temperature sensor is working properly (as temperature goes over 209 degrees it triggers the fan to come one). Signs of a Failing Radiator Fan. Identify the fuse again for the radiator fan controller or the fan if your car’s radiator fan is not functioning properly. Look at the connector on the harness, make sure the pin tension is tight on the temp sensor sockets. How can a broken radiator fan on a car cause the air conditioning …. One of the first symptoms of a potential problem with the cooling fan resistor is engine overheating. or Failing Cooling Fan Resistor. So broadly speaking, the radiator fan will turn on when it finds two conditions, namely when the engine temperature is hot and when we turn on the AC system. Here's how to fix it yourself for under $20. When the engine is in use, it produces a lot of friction and heat, and the radiator uses coolants to keep the engine running at a healthy temperature. Speed should be set for both cooling fans. The radiator fan should be running at more RPMs than the motor. The temperature gauge will also be pegged in the danger zone. Unplug the electrical connectors to the radiator fans. You may have a bad engine temperature sensor. Irregular Air Temperature From Vents. Below is a detailed list of what causes radiator fan issues. Radiator Fan Doesn’t Come On Most commonly, the faulty fan won’t enable when it’s broken. If your Aveo 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 only one fan is working, it could still be the motor that needs replacement on. The fan switch is one source of ground when the radiator is at temperature. Wrong wiring or broken wiring can cause a short circuit. Refer to the top or side of the relay to. Drive on highway and repeat as necessary. The Cooling Fan Is Not Working. Any visible signs like broken blades indicate. When I restarted the engine (reassembled the motor and put everything back in) the fan was on . Set the multimeter’s meter to ‘20’ in the DCV. Please let us know what you find. ford fusion radiator fan not working Rad fan is not cutting in leading to overheating, relays seem ok, thanks for - Ford Restricted radiator air flow. As for the engine coolant temp sensor, if the coolant is not hot enough to make the fan come on, then there is no need for the fan yet and there is no problem. HOWEVER, the radiator fan does not turn on with the compressor. The radiator on this vehicle is constructed of plastic and is known to have more problems with leaking than its older counterpart, the met. Cooling/Radiator Fan not working after replacement. Check your coolant level, if its very low the temp sensor may not be covered and therefore not detecting the correct temp to kick the fans on, . Radiator fan high speed mode not working. if your engine is off, like not even in accessory on, and the fan runs for more than 300 seconds then there is one of two problems: 1) …. The fans did not turn on so i changed the thermostate, fans, and cooling sensor. I came home and I never heard my fans running. Vehicle Overheating The second symptom of a damaged radiator fan motor is that your car is currently overheating. Re: Engine cooling fan won't turn off, even when engine is turned off 44 Answers. If your Ion 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. Check the connectors in the relay and the control unit to make sure they’re not loose and the wires are not disconnected. Unless the wiring issue is fixed, the fuse will blow again. The temperature of the engine is decreased by fresh air while it is operating, but air cooling alone is insufficient for times when the engine is not in motion but still producing heat, such as during traffic jams. I bought a new aftermarket 09 mazda3 fan online since it was a lot cheaper. CAR OVERHEATSIf the radiator fan is not working on your BMW e91, e90, e92, e93 we will explain a few. Therefore, when the radiator fan becomes faulty, the engine stops working at its optimal temperature, and this may cause damage to several engine components if not addressed on time. In addition, the break may cause serious damage to the alternator, radiator, steering pump and other parts the belt controls. Why is Cooling Radiator Fan Not Turning On How to. Unplugged the temperature sensor and fans came on. An obstructed radiator; Cooling fan(s) not working properly; Faulty engine coolant temperature sensor. The car coolant is the liquid that removes heat from the radiator. 2003 Honda Element EX AT 2WD 355k+ miles, 2003 Honda CRV EX AT AWD 310k+ miles, 2018 Ford Transit LR XLT RWD 40k+ miles. A dead battery is a high possibility. There will be multiple contacts on each fuse. If there’s a clog, then the radiator can’t provide the cooling power needed to disperse the heat. 13 on disconnected DME plug and ground. If the radiator fan is not working, it’s a serious problem. The CPU is the most important component to keep cool. There are also other issues that may cause this, it’s important to make sure the fan works properly to prevent overheating. but to be sure here is a guide and the cooling fan wiring diagrams so you can see how the system works with the relay location as well: 00 Miles I Had Taken My Car To. 7LWell I tried replacing the fan relay because the fans are not blowing very hard and the car coolant is running. [Answered] March 31, 2023 A car’s radiator cooling fan is vital in keeping the engine temperatures down by reducing the temperature of the hot coolant as it passes through …. Your radiator fan could be broken if the radiator fan won’t work when AC is turned on. Did you run the engine when you had the sensor disconnected? If not, try running the engine with the sensor disconnected before checking the . It does not come on when the ac is turned on and it doesnt come on even though the temp is climbing all the way to 217-219 degrees, I shut it off after this to not let it keep. If you notice that your cooling fan still keeps spinning after the engine is off, it. Be sure the air conditioning is off. Reason #7: Radiator Fan Motor Not Working Correctly. How to Test Radiator Fan with Car Battery. What to Do When Your Car's Defroster Stops Working. The coolant temperature sensor itself is often quite cheap, and you can often find them for around $40 for a quality one. The other fan is controlled by the A/C and also will come on if the coolant temperature rises. The following write-up is an article Lucas Valdes (Prez & Resident Mechanical Engineer of GoWesty) wrote to provide some info on the Vanagon cooling system operation. If you had a datalogging device, some of them allow testing of the fans (not . Labor costs are estimated between $40 and $50. Honda Cooling Fan Troubleshooting 2006 Civic (2006. Fan only works when the A/C is on. 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. when you open the box behind, you will find the fan relay to the most left. Most sensors if not working properly will throw a code. Depending on the speed of your car, the cooling fan ensures the engine stays cool in every situation. If one fan is working and the other isn't, there may be an interruption to the nonworking fan's electrical supply. Both Radiator Fans Stopped Working/ Fan Relay. Watch for rad fluid to start flowing . You would need to disconnect the Engine ECU connector A76 and . you need an OBDII reader to access the codes. Code 15 CTS signal voltage high. Radiator fan isn't working but the the car isn't overheating. Saturn redesigned the guage due to customer complaints of "overheating," when in reality ther car was operating as it was designed. However, when the car is idle, there is no air movement and the condenser fan is the only tool for cooling the refrigerant. However, like all mechanical parts, radiator fans can malfunction over time, posing serious threats to your car's health and safety. Toyoto Camry 2013 Radiator fan stays on after car is off. I believe it is an intermittent relay. How much do you know about engines? The average person only knows how to carry out basic maintenance, like changing the oil and topping up the radiator. Hyundais have a common problem with the A/C not working when the car is stopped, often due to a bad connector. Radiator Fan Turns On When The Car Starts – What There Is To …. Radiator Fan Clutch Replacement. out ok so I replaced the fan module. This is an older thread, you may not receive a response, and could be reviving an old thread. When disengaged, it turns the fan at 25-35 percent. There are times when old wiring succumbs to constant heating and needs to be replaced. Condensor fan comes on strong, but radiator fan does not move. The fan itself runs off a fusable link so that is good or your car would not even be running. Then warm up your vehicle and see if the defroster starts working better. Most car radiator fans cost between $100 to $400 depending on the type and brand. 2007 Dodge Caliber Engine Cooling Fan. Troubleshooting Hyundai Air Conditioning Problems. Running a car hot for a long period of time can lead to other damages like a blown head gasket. If fan turns on, replace the radiator temp sensor. If your car does not have a working radiator fan, it is best to have it repaired or replaced before driving it. Understanding how car sensors work isn’t easy, since they’re made for many different purposes and work in numerous ways. when they leak 4 Model Years Affected. If only one radiator fan is working, check the other one. 00 but it will not be available until tomorrow. It's very common for the turbo return line seal to leak oil. Start by unplugging the positive and negative feed wires (should put out approximately 12 volts DC). Inspect the connector plugs for any signs of corrosion. A car radiator fan is important for regulating engine coolant temperature, if it stops working the engine could overheat. Then why the radiator fan only turns on when conditions like that? see the explanation below. Disconnect the battery , and take off the wiring terminals to the motor or disconnect the plug. Other issues that may cause this could be a switch that has heavily corroded terminals or if there is an air-lock in the system where the switch . The car doesn't overheat and the cylinder head temps report just over 180 while I'm driving and idling but the fans don't seem to be working. Bad connection anywhere for that matter. Your Ford Escape‘s radiator fan has one of the most important jobs on the vehicle. When the car is moving, this happens anyway; but when it is stationary a fan is used to help the airflow. I also did a activation of cooling fan with a scan tool and fans came on. yes thats the sensor and it has two wires. A radiator fan that is constantly on may be triggered by the air conditioning when it is on. I can wait to hear back and see the relay/fuse diagram for the …. -Large fan is not kicking in at all; Was tested through vagcom for operability and worked fine-A/C not blowing any cold air at all, when turned to hot it blows hot fine; Refrigerant pressure meassured with vagcom ~5. Check Engine Light With Codes P0113 and/or P0153. One goes to the radiator; the other goes to the dashboard. How I test that module? And I notice that it try to work, but it …. If you observe that the car radiator fan is not working even when the car is heating up, then old fan wiring could be the culprit. Radiator cooling fan not working. Both fans were replaced about 3 years ago. The coolant mixture in your vehicle should be a 50/50 mix of water and antifreeze. The temperature gauge slowly starts to rise once you start the car. It will be at the base of the radiator, in between the core and the main hose. How to Repair a Cooling Fan in Your Car. You’ll need to locate and test the engine temp sensor. The fan runs continuously (longer than 1 hr) after removing the key on a cold engine. If your car’s radiator fan is not working, check your car’s owner’s manual and find the fuse for the radiator fan controller or the fan. This is caused by the motor burning out, rendering the fan …. if it's bad the fan will not come on. I don't know of the gauges, but the expense would be pricey due to. It does come on as commanded by the AC - which is wierd as it is via the same ECU. Discover the Best Car Magazines for Enthusiasts. Check for any damage and clean the connector. Is the fan working while in the car at all? Remember to check resist to Ground @ the plug Hope this was some help not too late! Thursday, July 10th, 2008 AT 11:34 AM Please login or register to post a reply. Then the metals expand at different rates causing headgasket issues and softening of alloys. One way to confirm that it’s a problem with a fan that led to the blown fuse is to change …. 46: Get a Quote: Or For Any Other Auto Repairs: and by relation enough heat to turn the cooling fans on. If the fan stops working, then heat cannot escape from the car, and the interior can get very hot very quickly. Matter of fact, some folks drive the cars this way all the time if in hot climates, with the fan high but its noisy. A bi-metallic strip on the outside of the hub heats and cools, and expands or contracts, which opens and closes a valve inside the viscous hub. If not, your radiator cooling fan might need to be replaced. Also, it may cause the A/C compressor to overheat and fail. If the fuse is OK, check your fan’s wiring and power supply. The a/c button turns the fans on LOW only, and the fans will still work on high if the engine temperature gets too hot, above 107C actually, or 224F. Okay, although the fan doesn't run doesn't necessarily mean it is faulty, there are various reasons for this such as the engine taking a very long time to reach the temperature required for the radiator fan to activate (winter is not the best time for this test) it could be taking a lot longer for the engine to reach that temperature due to the …. The fan comes on only when the engine is very hot. Your Chevy’s engine control unit signals the fan when to turn off or keep running. Why is my Buick over heating and coolant fans not working. The cooling fans are designed to turn on once a. We have done the following: replaced thermostat. TT (Mk1) Discussion - Radiator fans not working - Today while idling for about 10-15 minutes my car started to overheat and I immediately . BMW 325i Radiator Fan Not Working? RepairPal will help you figure out whether it's your Fan Assembly, Fan Clutch, Coolant Temperature Sensor, or something else. I then took and tested it against my fan by turning on the A/C while the car was on. There should be two wires providing positive and negative feed to the fan. Use the other side with their respective terminals on the fan motor. There's a number of reasons your cooling fan is not c. As we know, the fans are controlled by a thermal switch mounted on the radiator. There is however no such thing as …. The cooling fan motor powers the cooling fan, which keeps the engine from overheating. You can check all the relays by starting the car and feeling for a click in the relay. Our 2015 Ford Focus SE fan is not working. Hello, First of all, the radiator fan should turn on when the engine reaches its operating temperature. Connect a 12 Volt power source directly to the fan and see if the fan comes on. I replaced the relays again and now they are NOT working. While a fan is not really needed while a vehicle is traveling down the highway, it is extremely important when driving slowly or stopped with the engine running. Condensor fan stays on, but radiator fan starts moving slowly. Now this does not mean that fan is working properly because fan is controlled by …. On the 98, you can reach in through the front of. The most common reasons a Dodge Challenger radiator fan isn't working are the fan assembly, the fan clutch, or the coolant temperature sensor. Consult your car’s user handbook to determine which fuse to replace. Overall, you can expect to pay somewhere along the lines of $200 to $900 total to replace a radiator with most vehicles falling in the $400-$500 range. Your engine temperature sensor is responsible for relaying your engine temp to the ECU. If your Vue 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. More research revealed that there is also a fan located in front of the radiator on the passenger side; this is the radiator fan. djkronik57 · #7 · Jul 14, 2014. When the Engine Reach this Temperature the Fan should start. In this article, we present a comprehensive collection of free car games that are available for download. The radiator fan works continuously when a faulty CTS sends false signals. Cooling fans will not turn on. Car Overheats When AC Is On: Causes, Symptoms, And How To Fix">Car Overheats When AC Is On: Causes, Symptoms, And How To Fix. Excessive Vibration: When a radiator fan is going bad, you may feel excessive vibration or shaking in the vehicle, especially at idle or when the fan is running at high speeds. As you stop, the cooling fan must work to keep the temperature down. The most common reasons for a radiator fan not working can be a blown-out fuse, a bad relay, or a broken wire. The check engine indicator usually displays a problem in CTS, helping you detect the issue. My friend pointed it out to me when we were trying to figure out why the coolant in the reservoir was rising when I would run the car. dealership to re-program the fan. They also dont come on when I switch air con on (turn off economy mode) air con will work tho but. Radiator Fan Symptoms, Problems, How to Test Radiator Fan ">Radiator Fan Symptoms, Problems, How to Test Radiator Fan. AC is not working and the radiator fan never starts running. Jeep Renegade - Radiator Fan Not Working (Car Overheating When Idle or When A/C is ON)If your car is overheating when idling or when ac is on (even though it. So at least that one would have to be working. Another common cause of radiator fan failure is damaged wires or loose connections. Check out these three common signs it’s time for a replacement fan. You'll have to push the lower coolant hose back out of the way. A second fan, for the condenser. what tells the ecu to turn on the fan is the coolant temp sensor. Disconnect the battery to work on a fan motor. A pusher fan sits in front of the radiator. Your A/C condenser fan, along with your . Any sort of overheating issue should be tended to as soon as possible to avoid the. From a cold start the fans stay off until the coolant temperature reaches a certain set point. Hello, I am working on a vehicle, it has two radiator cooling fans but none is working while the engine is running. The switch for the radiator fan is on the radiator. The new fan runs like it should, and my old one is still on and off. Check the wiring and connections and look for a wire slipping out of the backside of the connectors. Hello All, I have just joined this forum as I intend to do some work on my Nissan Micra. Radiator Fan Not Working: Common Causes & Troubleshooting">Radiator Fan Not Working: Common Causes & Troubleshooting. Most vehicles use this type of radiator fan because it’s enough to cool their engine. The RDI fuse sends power to the fan #1 relay. Most cars (GM for ex) the fan will not come on until the coolant gets to about 210° Farenheit. Also there is a relay and the fan motor itself lets use these guides to check the fuses first then the relay and finally the fan motor. one in each corner so to speak. Once your vehicle has cooled down, you can check under the hood and see if the cooling fan is properly spinning. The first part to check is the fan wiring when the fan isn’t working. The fuse box is typically located in the engine bay or in the dashboard. The radiator fan helps cool down the engine and other components of the car by blowing air over them, thus preventing damage due to …. check coolant fan fuse and relay. If your Town Car 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. There's enough coolant in the reservoir, and the water pump if working fine. The only way to find out is by turning on the vehicle and letting the engine get hot. The one in the thermostat housing is responsible for switching the fan while the engine is running, the one in the head is responsible after the . What Causes A Radiator Fan To Run Constantly?. I have a 2000 Dodge Grand Caravan that has 195,000 miles. The car radiator fan is called a cooling fan. I have replaced head gaskets, oil cooler, water pump, thermostat, radiator, and fan. This air flow removes heat from the coolant created by the engine using the radiator as a conductor. Something to think about, ac relay and fan relay are side by side. The resistor pack inside the fans will burn out and the fans will stop working on low speed but will still work on high speed when the engine gets too warm. You problem could be a bad temp sensor at the. When the A/C is turned on, the fan moves air across the A/C condenser, thereby removing heat from the refrigerant, which changes …. To do this, set the heater controls in the car to maximum heat, remove the radiator cap (or remote mounted coolant pressure cap, sometimes on the overflow tank) and fill to the correct level. The car should reach running temperature after 5 mins running at idle. This has been enough to turn off the fan for the past year or so. Overheating is one of the first common symptoms of a bad fan clutch. If you have a fan for the engine and one for the ac, the engine fan may not be working. If the coolant level is low, you need to bring it back to the optimum level. I wanted to test which part of the system wasn't working before I dropped $300 on a new fan. Lincoln Town Car: My radiator fan is not working even with My radiator fan is not working even with a/c on, causing overheating when idle. 2010 XC60 Engine Cooling Fans Not Working Properly. Replaced the transducer on the ac line which I was told could cause fans not to run too, no change. You may have a faulty radiator fan. Why Isn’t My Radiator Fan Working?. This is problematic for a number of reasons. check the basic, from fuse and relay engine cooling. First, the engine can sustain damage that will lead to further repair work; second, the engine can overheat; and third, the car can be rendered undriveable until the problem is fixed. As the engine heats up, the thermostat should open up and allow the coolant to flow from the radiator to the engine. Check the connectors at the fan or check the radiator temp sensor at the base of the radiator. I was wondering if anyone knows why the engine cooling fan does not go off when you turn engine off. Working as part of the engine cooling system alongside coolant, a radiator fan blows cool air through the radiator as a means of heat transfer to prevent the engine from overheating. If the wiring is perfectly fine, then you must check. When the radiator fan isn’t functioning properly, it is not able to adequately cool down the car’s engine. The problem is most likely with the PCM. stevemcs said: Its a 2 stage fan, the first one should come on when the AC is on, the second should come on around 105degs - if you have Mini connected and Nav you can download the app and you can. If the fuses are intact, switch on the ignition and use a …. Car temperature gauge goes up and down; Black smoke from the exhaust; Engine misfire; Engine overheats; Radiator fan not working; Bad engine performance; Check engine light. If your car’s radiator fan has stopped working, it is not advisable to drive your car for long periods as this can cause damage to the engine. Replaced relays, thermostat, and fuses to no avail. Scion tC 1G Drivetrain & Power - Radiator Fan problems. Checked the fuses/relays, all good. A faulty radiator fan can cause many problems. Bought a 2009 Ford Flex recently. I replaced the (3) relays 1 month ago and the fans worked. Bad Cooling Fan Relay Symptoms. Check for a switch at lower part of rad. So it seems that the gaget that should tell the fan to turn on (I would think at 140 degrees or so) isn't working. When an engine is running, it produces heat, and that heat dissipates so that the engine does not become too hot and overheat. To make sure that the radiator fan itself wasn't broken we checked the relay of the fan. As a result, it is critical to understand the causes of radiator fan failure so that you can fix or replace it as needed. Radiator Fan Not Working: Common Causes 1. Which one isn't running? Your Cooling fan should not turn on if your engine is not over operating temperature threshold. Reasons why your radiator fan may not be working. Lincoln Town Car: Radiator Fan Not Working Diagnosis. Here is what I found: One main thing to point out is the Manual version of the car has a single electric fan on the engine side of the radiator. Why is Cooling Radiator Fan Not Turning On How to Check Test. The most basic way to check the fan is working is by removing the connector cable that goes into the radiator temperature sensor, it will have a socket on the end with three holes. If the car is moving faster than 15 mph your engine should stay cool.