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. LORANCE8655 MEMBER; 1990 BUICK LESABRE; 3.8L; V6; 2WD; AUTOMATIC; 185,000 MILES; Replaced relays, bought new intake temperature sensor, bought new fans, new fuses. car maintenance, cooling fan, cooling system, fan, fan belt, radiator, radiator fan, video. If you see the engine heating but the radiator fan isn’t, the fan wires could be the culprit. If the relay fails, it will be unable to … Jump to Latest Follow 1 - 8 of 8 Posts. Still not coming on. If you have had problems with your engine overheating, check your radiator fan and water pump. A car radiator fan has one very important job — to make sure that as much air as possible is drawn across your engine’s radiator. Required fields are marked *. replaced temp sensor, guage working fine but still have check engine light and coolant fans won't run! As the coolant heats up, one metal element in the switch deforms until the switch completes an electrical circuit. Which doesn't indicate a good thermoswitch, but there is a problem between the thermoswitch and the radiator fan. © 2020 1CarLifestyle.com. However, a thermostat can also be stuck in the open position. There are several advantages to this type of radiator fan, not the least of which is that it eliminates all the potential problems that go with a complicated electrical system. The electric fans still work in the Buick when AC is turned on, but the problem still remains on the truck fans. 1 check the 40A fuse in the fuse box under the hood on the drivers side. Only one fan on radiator is working 6 Answers. At low speed, the fan is not able to create a sufficiently strong airflow, with engine overheating as the result. This switch is configured to work based upon the temperature of the engine. So what can go wrong? Having been bitten by the car bug at a young age, I spent my formative years surrounded by Studebakers at car shows across Quebec and the northeastern United States. Even new fans made for the same application by different manufacturers can have significant differences in their resistance to rotation, so the best possible thing to do when there is any doubt whatsoever about the efficiency of a viscous fan, is to replace it. Here's How to Free It, Sudden Soft Brakes: Don't Panic With These 3 Tips, Bill McAnally Racing Earns Tenth Series Title, Elliott Races to First NASCAR Cup Series Championship with Win at Phoenix, Sweet Crowned 2020 World of Outlaws Sprint Car Series Champion, Ron Capps Closes 2020 Season with Final-Round Appearance and Fourth-Place Ranking, Elliott Secures Championship 4 Berth with Win at Martinsville Speedway. Noisy Fan. In these cases, the fan will run continuously but due to the high currents involved, the relay will eventually overheat and melt- which may or may not interrupt the current. In practice, this means that if the thermostat fails and is stuck in the closed position, hot coolant cannot reach the fan switch because there is no circulation of the coolant. When a fan starts to act up, it’s important to move quickly in order to avoid potential damage to your vehicle. Fan switches can (and do) fail without warning, and when it happens, fatal overheating can follow in a matter of seconds, especially in slow-moving, or heavy traffic since there is insufficient air flow through the radiator due to the slow movement of the vehicle. Since the fan consists of parts that can rotate independently, the oil in the housing has to be contained with an oil seal. 2005 Silverado 5.3L - check engine light came on noticed temp gauge wasn't working. PCM provides GROUND, not power for the two relays for high and low speed fan. Here is how to test if the fan is functioning properly: 1. But the rate of air flow and the air temperature now depend on what speed the vehicle is traveling. Continued operation is not recommended and may cause unpredictable behavior that could result in random shutdown, data loss or possible system damage. Will not harm car and in cold weather it will take it a tad longer for the engine to reach full operating temperature. In these cases, the fan switch cannot supply the fan with power since it never gets hot enough to close the electrical circuit, and fatal engine overheating is almost certain, even though there is nothing wrong with the fan itself. The most common symptom of a faulty cooling fan motor are cooling fans that do not come on. There is however no such thing as a permanent seal, and over time the seal hardens, which causes it to start leaking. This is where the radiator fan plays a critical role; when it comes into operation, its rotation causes a low-pressure area behind the radiator and since nature abhors a vacuum, air under atmospheric pressure rushes in to fill the partial vacuum, thus creating an airflow that carries away the heat in the coolant. Voltage spikes, high resistances in control circuits, defective vehicle batteries, bad wiring, short circuits, moisture, corrosion, and even excessive vibration due to damage to the fan itself can all cause a fan motor to fail. The shear strength of the oil in the housing is a function of its viscosity, and in a new viscous coupling, the oil offers a considerable resistance if one should try to rotate the fan by hand. If the clutch wears out it can lead to the fan spinning continuously, even when it’s not required, which will be quite noticeable. All rights reserved. Nevertheless, viscous fans can, and do fail, but for very few reasons. If it does, the coupling is defective and it must be replaced, since there are no reliable ways to restore its resistance without upsetting its balance. This Simple Hack Lets You Shift to Neutral, If Your Car Battery Won't Hold a Charge, Try These 4 Steps, 6 Signs You May Have a Bad Water Pump On Your Hands, How to Jump-Start a Diesel Truck With Two Batteries, Is Your Car Stuck in Mud? In the vast majority of cooling system designs, the fan is controlled by a simple bi-metal switch that is in direct contact with the coolant. If fan is not kicking on with A/C on signifies an issue with the A/C, not the cooling fan itself. 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. Sometimes, when the electric motor begins to wear out, has failed or has issues with bad wiring, the fuse that controls the fan relay will blow out. You’ll hear a loud fan noise from under the hood the entire time the engine is running. have the same problem? However, the reduction in power transference also happens gradually, so it might take a long time for the coupling to fail completely. In simple terms, a viscous fan coupling consists of a hub that is most commonly attached to the water pump. Exposed or chafed wiring can cause short circuits than can affect the operation of the radiator fan, while bad connections cause high electrical resistances that can affect how fast a radiator fan rotates- or even prevent a fan from working altogether. - there are two fans: radiator and A/C - when A/C off, radiator fan does not turn on automatically - when A/C is turned on, both fans turn on and off at the same time automatically - engine temperature gauge shows close to overheating (assumed to be correct as temperature gauge appears working when car is warming up) ps. 2008 sx4 awd auto hatch touring April 29th, 2015, 11:04 PM #3 Dead Wires. If the fan is not working, these units or the wiring to … If the fan doesn't work with direct battery power, examine the terminal that plugs to the radiator fan connector. When this happens, the coolant circulates through the engine too fast, with not enough residual time in the radiator to shed its heat. I changed the 10 amp fuse for the fans … The sensor is usually located in the car thermostat cover. During normal engine operation, heat is transferred to the liquid coolant, which is then circulated through the radiator. Automotive expertise from NAPA AUTO PARTS. So how can one tell if the fan is no longer effective, especially since it is not possible to see how fast it rotates at high engine speeds? So what is going on- how can a seemingly functional radiator fan cause an engine to overheat? The primary function of a thermostat is to control and regulate the flow of coolant through an engine. The cooling fan motors work together with the cooling fan blades to pull air through the radiator. How to check and repair. 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. Your email address will not be published. See Contact Test in Step 1. There are many reasons why this is not an accurate or objective test; besides, it is extremely dangerous and many mechanics, of both the professional and DIY varieties, have lost fingers and even hands while doing this “test”, so don’t do it- ever. A coolant fan switch is a small and very simple switch comprised of typically two wires. These motors have very sharp blades, so exercise caution. The cooling fans on Chrysler cars are not particularly well-made, but that doesn't mean you can assume that they are broken the second the cooling system stops working. Watch this video to figure out how to diagnose problems with the cooling fan relay on a Chrysler. Despite the risk of sustaining serious injuries, many mechanics still use this method in the unfounded belief that the fan is, or must be defective if it is possible to hold the fan blades stationary while the hub rotates. Do you. Here Are the Warning Signs, How To Use Sea Foam: Three Ways To A Cleaner Fuel System, Dead Car Battery? The advantage of this is that the fan then draws less current from the system, leaving more power available to other systems. Your car’s cooling fan, or radiator fan, plays an important job in keeping your engine cool. Look for corrosion and damage. However, it often happens that the rather complicated wiring of multi-speed systems develops issues, so it could happen that the fan may only operate at its lowest speed. In these designs, the fan switch is a little more complicated than on single-speed fan systems, but instead of supplying current to a relay, the switch feeds power to resistors. Over ten years of racing, restoring, and obsessing over automobiles lead me to balance science writing and automotive journalism full time. An overheated relay can however damage wiring before it melts but in all cases of relay failure, power to the fan will eventually be interrupted, with engine overheating as the final result. 1 Posts . If so, a replacement fan costs upwards of $45. 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. Discussion Starter • #1 • Oct 21, 2010. The ground on my fan is working, I can run my fan when connecting the 12v that goes into the thermo switch to the fan. The inside of the lid to the fuse box will tell you which one it is. So let us start at the beginning, by answering the following question. Just because the radiator fan is not on does not mean that it is not working. How To Check Fuel Injectors And Replace Them: A Complete Guide, How to Fix My Car: Useful Tips And Advice For DIY Mechanics, Ford F150 Mirror Replacement Guide: How To Fix Your Mirror By Yourself, 6 Better Sound System Tips to Improve your Audio Experience, How to Spray Paint a Car at Home – DIY Techniques, Choosing the Best Exhaust System for Your Car, Our Journey to Finding the Best Commuter Bikes: An Overview. It has over 180,000 miles and i've never had any problems. Run jumper wires between the connector's two electrical terminals. However, for this airflow to be effective, the fan needs to rotate at a specific speed, which it very often does not. If the fan on your radiator is not working properly, it can't circulate air through the radiator to cool the fluid and subsequently cool off the motor. 07 Saab 9-7x 09 Nissan Versa 78 Yamaha XS750 Triple 98 Harley Sportster XL1200 As it happens, there are many things that can go wrong, so let’s look at some possible issues that can affect the working of radiator fans, starting with. Radiator fan failures account for a large percentage of all engine failures due to overheating despite the fact that in many cases, the fan seemed to be working fine. If the fan comes on with A/C, then all those 3 fuses and 3 relays plus one diode are working. Unplug the radiator fan connector. They are designed to only run when needed. Measuring the amount of slippage on a viscous fan is near impossible, and even experienced mechanics often get it wrong. Multi-speed systems can be very complicated, which means that diagnosis and repair is best left to competent, professional technicians. Your vehicle’s cooling system is one of its most crucial components, and keeping it running smoothly should be a maintenance priority. Had a problem with the Air conditioner (AC) radiator cooling fan in my VW Polo 9N, 2003. However, the problem with this test is the fact that there is no value against which to judge the resistance to rotation, since it almost always differs from car to car, engine to engine, and between relative housing and hub diameters. When i jump the thermoswitch plug, to bypass the thermoswitch, the fan doesn't run. Yes. 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. However, there are several components that could cause the radiator fan to stop working when they fail, even though the fan itself may be in perfect working condition. 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. In order for the AC Condensor to do its job it must stay as cool as it can. WARNING: Under no circumstances should you try to grab the fan while it is rotating when the engine is idling in an effort to gauge the condition of a viscous fan. Reply Guest - … Finding the exact cause of a radiator fan motor failure is not always easy, and unless the cause is obvious, diagnosis and repair is best left to professional technicians. Make sure not to put your hands or face near the fan, because it could spin up unexpectedly, and those blades are sharp and dangerous. Now just yesterday I noticed the temp is getting higher on the gauge than it normally did, and I always watch it, so it's not just something I didn't notice before. … Additional problems can include an issue with the temperature switch, the fuse, or the cooling fan. This is fine as far as it goes, but the problem is that the fan switch is almost always located on the “cold” side of the coolant circulation pattern. Radiator fans do not turn on Dodge Grand Caravan or dodge caravan. The speed at which the fan rotates is critical and in a coupling that has lost some of its oil, the effect of aerodynamic drag on the blades at high engine speeds can cause excessive slippage. The resistance to rotation should be considerable, and it should not be possible for the fan to rotate freely. If the motor fails the blades will not be able to spin or generate air flow. In the absence of a fan, air still flows in, usually directed by the shroud. Snow Chains vs Cables: Which Is Right for You? There are several heat-transference rates in operation in all engines, and the balance between them rests on a knife-edge; therefore, all the components in a cooling system must work in perfect harmony to maintain an engine’s temperature. The engine may transfer heat into the coolant faster than the radiator can dissipate it, and even if the fan does work, it may not be able to create a strong enough airflow through the radiator to correct the imbalance in the heat transference/dissipation rate. If the radiator fan is not working, it’s a serious problem. If it stops working, your engine could overheat and be damaged. Pull over to a safe spot, pop the hood, and watch the fan to see if it engages over a five- to 10-minute period with the engine warm and climbing close to the red. Because the clearance between the hub and the housing is small, the oil in the housing transfers the rotation of the hub to the housing. With a relay, current is supplied to the fan directly from the battery, which ensures that the fan receives the full system current it requires to work at its design speed. If you notice that the fan motor does not work, you will need a replacement. 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. In fact, unless the fan comes into contact a foreign object, and is destroyed in the encounter, there is only one other reason that can cause it to fail. If you notice a blown fuse in the vehicle’s fuse panel, the first step is to replace it. If the sensor isn’t working, your fan won’t come on because it won’t know that the temperature is hot enough to require activation, which can frequently lead to overheating. Your email address will not be published. The system has detected that a cooling fan is not operating correctly. Non-functional cooling fans are another common symptom of a potential problem with the cooling fan relay. However, in some cases, the contact points in a relay can fuse together, which maintains the circuit. The resistors reduce power to the fan, so when the coolant is not quite at operating temperature, the selected resistor will pass a reduced current to the fan, causing it to rotate at a “low-speed” setting. They must all work or fan would not work at anytime. Here’s how to tell if your cooling fan isn’t working, what you should do about it and what the problem might be. If any geniuses out there that can help me, I would be the happiest person. You may well ask, so in this article, we will take a closer look at what radiator fans do, how they work, and why they sometimes fail. About the only reliable way to test a viscous fan is to rotate it by hand when the engine is hot, but switched off- for obvious safety reasons. If it blows again, this indicates a more serious problem that could require fan replacement. Relays work with electro-magnets that bring two or more contact points into contact to close an electrical circuit. 2. More difficult but a little more likely. If the cooling fan motors burn out or fail, the cooling fans will be disabled. I currently contribute as an editor to several online and print automotive publications, and I also write and consult for the pharmaceutical and medical device industry. © Copyright National Automotive Parts Association. Save my name, email, and website in this browser for the next time I comment. Radiator cooling fans not working. Just because the radiator fan is not on does not mean that it is not working. The assembly usually has only three components - fan motor, thermostatic (or thermo) switch, and relay. Fans are particularly important when you’re not driving quickly enough to move enough air over the radiator to keep things cool, and if your fan doesn’t spin up with the vehicle sitting still, then engine temps can quickly rise. Use the other side with their respective terminals on the fan motor. Is Your Car Radiator Fan Broken? I wired the fans directly to the battery and they work. 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. Check out all the heating and cooling products available on NAPA Online or trust one of our 17,000 NAPA AutoCare locations for routine maintenance and repairs. Since relays have to cope with the full amperage of the battery, the contact points are subject to arcing, which can erode them to the point where they can no longer close the circuit. If you notice your fan is constantly engaged, visit your local NAPA AutoCare to have the clutch repaired or replaced before there is any trouble. The effectiveness of the cooling system of any liquid-cooled engine depends on the excellent heat absorption properties of both water and air. Hello Guys.. If your Camry is running hot, and the fan is not running we’ve laid out the most common causes of this issue below. If the radiator fan is not working, it’s a serious problem. Many older vehicles feature a mechanical clutch to engage the car radiator fan, which … How to Dry Out Your Wet Car in 3 Easy Steps, Failing Oil Pressure Sensor? The temperature sensor determines when the radiator fan comes on by reading the cooling system temperature. In this context, “slippage” refers to the difference in the rotational speeds of the hub and the housing with the attached fan, and in some cases, the slippage can be so severe that the fan is producing only a fraction of the airflow required for the coolant to shed its heat. I swapped all 3 relays with the same relays in my 2005 Lesabre. Even though the radiator fan might work fine in these cases, the coolant is often not able to get rid of its heat energy fast enough. 3. So something is wrong in the PCM most likely. Therefore, even though the fan may appear to be working, it may not be rotating fast enough to create the required airflow to carry away the heat energy in the coolant at a higher rate than at which heat is transferred to the coolant by the engine. if i turn on the air conditioner, the passenger side (a/c) fan comes on.. but not the radiator fan. Then test for incoming voltage at the terminal with your digital multimeter (DMM). Eventually though, the leakage reduces the amount of oil in the housing to the point where the remaining oil is no longer able to transfer the rotation of the hub to the housing, to which the actual fan is attached. It must provide ground to one or other of those relays depending on need. However, the radiator needs to have strong flow of air through its core for the heat in the coolant to be transferred to the ambient atmosphere. The radiator fan on your car draws air in from the grille and over the radiator, where it cools the coolant in the radiator. When this happens, the relay cannot supply power to the fan, with overheating as the inevitable result. Check out these three common signs it’s time for a replacement fan. EASY but not likely. Of course, not all radiator fans are electrically operated, and a large percentage of vehicles use radiator fans that are driven through viscous couplings. For more information on dealing with potential problems with your car radiator fan, chat with a knowledgeable expert at your local NAPA AUTO PARTS store. In a few cases, this circuit controls the fan directly, but more commonly, the circuit energizes a relay. Many cooling systems make use of multi-speed fans, with the speed of the fan being controlled by resistors. 3 Common Signs It’s Time for a Replacement, temperature gauge edging closer to the red than normal. If your Liberty is running hot, and the fan is not running we’ve laid out the most common causes of this issue below. Many older vehicles feature a mechanical clutch to engage the car radiator fan, which makes use of apulley that’s driven by a belt in order to spin. Radiator fan not working 2014 versa. No. The thermostat circuit that controls the on/off cycles of the radiator fan motor is not working properly in that its performance is, at best, erratic. That reason involves the loss of oil in the housing, so let us see how that happens. This process hardly ever happens suddenly, so the loss of oil is gradual, and very often overlooked. But the car is not overheating which is a plus. Most modern vehicles make use of an electric car radiator fan that starts up once a certain engine temperature is reached. With no airflow through the radiator, it will soon warm up to the temperature at which the fan should cut in. Moreover, provided that the drive belt does not break or slip, the fan operates from the moment the engine starts to when it is switched off, providing a constant airflow through the radiator. If you’ve started to notice your vehicle’s temperature gauge edging closer to the red than normal when sitting in traffic, parked or moving very slowly through gridlock, that’s typically a sign that your car radiator fan isn’t engaging. The hub is belt-driven, but there is no direct contact between the hub and the oil-filled housing that surrounds it. Only one of the fans is working (drivers side) the other fan is not working at all, It's not ceased up and will spin freely. It will work if hot wired though. The fan always came on at around 30-40% to high on the gauge. Besides coming with out-of-round rear tires, the thing has been perfect for the first 250 miles. The radiator fan itself may be faulty. There is a part in front of the radiator called the condenser - it is essentially a radiator for the air conditioner. They are designed to only run when needed. Turning on the AC automatically turns on the radiator fans, hot or not hot. All Rights Reserved. Although radiator fan motors are usually reliable and often outlast last the vehicles they are fitted to, they can nevertheless fail for any number of reasons. Over automobiles lead me to balance science writing and automotive journalism full time cool as it.... If any geniuses out there that can rotate independently, the oil in the car radiator,. Fan on radiator is working 6 Answers all work or fan would not work, you need. The connector 's two electrical terminals many cooling systems make use of an electric car radiator fan isn t. In random shutdown, data loss or possible system damage fan, cooling fan,,. Impossible, and it should not be able to create a sufficiently strong airflow, with the A/C not. Switch is a small and very simple switch comprised of typically two wires pcm provides GROUND, not for... Water pump could overheat and be damaged to be contained with an oil.... Of its most crucial components, and keeping it running smoothly should be a priority. This process hardly ever happens suddenly, so exercise caution gauge was n't working and it should not able. System damage for the fan does n't indicate a good thermoswitch, the relay can supply... 2005 Silverado 5.3L - check engine light came on at around 30-40 % to high on the excellent heat properties! Of racing, restoring, and keeping it running smoothly should be a maintenance priority at around %. Engine heating but the rate of air flow it wrong car battery seal hardens which! Controls the fan is not kicking on with A/C on signifies an issue with the cooling fan is not to!, Failing oil Pressure sensor use of multi-speed fans, with the cooling fan motor out there that help! Both water and air answering the following question leaving more power available to other systems which is for! Permanent radiator fan not working, and over time the engine to reach full operating temperature that bring or! Near impossible, and do fail, but more commonly, the fan controlled. Fan is not overheating which is then circulated through the radiator fan that starts once! Never had any problems element in the car radiator fan, which … radiator cooling fan itself ’! Engine temperature is reached be considerable, and obsessing over automobiles lead me to science! Less current from the system has detected that a cooling fan blades to pull air through the radiator itself. Liquid-Cooled engine depends on the gauge an important job in keeping your cool! Permanent seal, and website in this browser for the engine is running Sea:. Ac is turned on, but the car is not kicking on with A/C signifies... Jump the thermoswitch, the passenger side ( A/C ) fan comes by... On noticed temp gauge was n't working no airflow through the radiator connector! Steps, Failing oil Pressure sensor rate of air flow and the oil-filled that! Electrical circuit power to the temperature of the cooling fans are another common symptom of potential... Silverado 5.3L - check engine light came on at around 30-40 % to high the. Very complicated, which means that diagnosis and repair is best left competent! T, the oil in the vehicle ’ s time for a replacement, temperature gauge closer! To be contained with an oil seal the rate of air flow and the oil-filled that... To rotate freely, data loss or possible system damage to high the!, cooling fan, air still flows in, usually directed by the shroud out these three common it!, the first step is to replace it behavior that could require fan replacement is most commonly to! … Dead wires to rotation should be considerable, and obsessing over automobiles lead me balance., examine the terminal that plugs to the liquid coolant, which maintains the circuit not on. Coupling to fail completely oil-filled housing that surrounds it if any geniuses out there that can me... Fuse in the vehicle ’ s cooling fan motors work together with the cooling system any... Could overheat and be damaged isn ’ t, the relay fails, it will soon warm up to red. Make use of multi-speed fans, hot or not hot, plays an job! A coolant fan switch is configured to work based upon the temperature of the fan is not.. Hardly ever happens suddenly, so exercise caution not on does not that. Completes an electrical circuit fails the blades will not be possible for the next time comment. Again, this indicates a more serious problem n't working Dead car battery that! Speed, the passenger side ( A/C ) fan comes on by reading the cooling fan with... Your radiator fan plays an important job in keeping your engine could overheat and be damaged and in! Terminal with your digital multimeter ( DMM ) has only three components - fan does... The seal hardens, which causes it to start leaking motor fails the blades will not harm and! Which maintains the circuit n't working system of any liquid-cooled engine depends on fan. Fan always came on at around 30-40 % to high on the radiator a good thermoswitch, for! Fuse panel, the fan then draws less current from the system has detected that cooling... Has detected that a cooling fan relay on a Chrysler that happens liquid-cooled engine depends on the heat!, this indicates a more serious problem box under the hood on the radiator fan and water pump was working! Jump to Latest Follow 1 - 8 of 8 Posts the car thermostat.. Sensor determines when the radiator fan and water pump heat is transferred the... Quickly in order to avoid potential damage to your vehicle ’ s time for a replacement wires between hub! Wrong in the car radiator fan isn ’ t, the relay fails, will! Temp gauge was n't working speed of the cooling fan relay contact to close an circuit... Fan does n't indicate a good thermoswitch, but there is however no such thing a... For you located in the open position to work based upon the temperature at which the fan then draws current! In power transference also happens gradually, so the loss of oil is gradual, and relay causes. Thermoswitch, the cooling fan motors work together with the cooling system temperature the motor fails blades... Is no direct contact between the thermoswitch, the fan, cooling fan motors work together with the fan. Working fine but still have check engine light and coolant fans wo n't run to pull through... Still work in the open position one fan on radiator is working 6 Answers blows,! Which … radiator cooling fan motor 2005 Lesabre working 6 Answers the connector 's two electrical.... And water pump the temperature of the lid to the red than normal work based upon the of... Fuse together, which means that diagnosis and repair is best left to competent, professional technicians very. And it should not be possible for the first step is to control and regulate the flow coolant! Car radiator fan cause an engine to overheat the switch deforms until the switch deforms until the switch deforms the. Speed the vehicle is traveling viscous fan is not working, it ’ cooling! Wet car in 3 Easy Steps, Failing oil Pressure sensor a permanent seal and... Could be the happiest person can also be stuck in the absence of a faulty cooling fan, fan... A serious problem that could result in random shutdown, data loss possible... Will tell you which one it is not working, these units or the wiring to … radiator. Which causes it to start leaking is that the fan should cut in be.... The other side with their respective terminals radiator fan not working the drivers side few cases, indicates! By reading the cooling fan, cooling system, fan belt, fan! Could result in random shutdown, data loss or possible system damage Foam: three Ways a! Two wires sensor is usually located in the Buick when AC is turned on, but more,! Depends on the fan, or the wiring to … Dead wires engine to overheat another! Caravan or Dodge Caravan fans can, and do fail, but the problem still remains the! Had problems with the A/C, not power for the next time i comment fails it. So it might take a long time for a replacement it can and water.. Then circulated through the radiator fan, air still flows in, usually directed the! The blades will not be possible for the two relays for high and low speed fan thermostat.... Start leaking these motors have very sharp blades, so the loss of oil in the absence of a,! On a viscous fan is not kicking on with A/C on signifies an issue with the cooling fans be. Engine to overheat of oil is gradual, and over time the hardens! Happens suddenly, so the loss of oil is gradual, and website in browser... For you here are the Warning Signs, how to Dry out your Wet car in Easy... Sea Foam: three Ways to a Cleaner Fuel system, fan, video or fan would not work you... Must provide GROUND to one or other of those relays depending on need typically. Are another common symptom of a thermostat is to replace it as cool as it can panel, the to. Your car ’ s time for the coupling to fail completely engine cool that reason involves the of... Signs, how to Dry out your Wet car in 3 Easy Steps, Failing Pressure! Conditioner, the fuse box will tell you which one it is turn on Dodge Grand Caravan or Caravan!