! If you don’t have resistance values, but you are able to deduct that the Ohms values remain the same during cold and hot temperatures, you should replace the sensor in order to fix your radiator fan. Later, I tested the cooling relays one and two. The cost is typically between the range of $300-$400. Even if the wires appear to be in great working condition, you should still inspect the relay – the job of the relay is to supply electricity to the wires. Despite a blown fuse not being a big issue, it is important to find and fix. Head gasket (Kwik Fit checked for this, no sign of it, so highly doubtful) 4. Otherwise the switch would not even be needed! In newer cars, you need to first ensure that the radiator fan has actually stopped working before you determine what to do next. However, in some cases, if you wait too long, the price can range from $300-$1,200 for a fix. That is just to help you figure out how I THINK it works. The job of the radiator is to keep the coolant at the right temperature so that when it travels back to the engine, it is able to take on more heat, and prevent the engine from getting too hot. Your going to need to check for power at the fan, the fan can still be failed and spin just fine by hand, considering you dont have high or low I would lean towards a fan or fan connector concern. Second, start the engine and start idling your vehicle. Once the temp gets so hot, the ECU commands the radiator fan to come on. As soon as you feel like your radiator fan has stopped working, or your car isn’t getting cool, you need to take some troubleshooting steps in order to determine what the problem is. This article pertains to all vehicles. If your coolant level is low there is a chance that you will get air in the system … Regarding the $300-$400 range, for a quick fix and a long-term solution, that price seems pretty fair to us. Had a brand new radiator in one and the machine shop didn't surface the heads right. 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. good luck . Now the cooling fans work for my Camry. Turning on the AC automatically turns on the radiator fans, hot or not hot. A seized engine can be caused by insufficient coolant, cursing the gasket to blow up, and the engine to leak oil. After this, connect the positive battery to the other wire. Circuit Breaker is Tripped. I am patient and will continue to keep working on the situation. In cases like this, you might find that it’s not worth it to buy such an expensive new part for your car. Fortunately for you, the average cost of a radiator fan is not very expensive. People often get confused about the cooling fan operation!! I looked it up and tried to explain it to him in my reply. The radiator is about two years old and the cooling system is clean. I have no online auto repair service (Mitchell On Demand etc) to refer to, i know the other guys do so maybe they can help. If you are satisfied that the thermostat settings are correct, check your … Thermostat (but would this cause the fans and AC not to spin?) Radiator. Posted on Jan 28, 2009 However, if there is an issue with the number of volts of electricity, then that usually means the wire needs to be replaced. Good luck with it! I changed out the fan for a new one, when changing it out i had to disconnect a coolant hose and introduced air in the system. If the wire stretches, the wire link could be broken and you’ll need to replace it. If the fan doesn’t come on at all or runs at a very low speed, then you need to replace the fan motor as well. That one worked, like this Camry. I want to know where the shut off switch is located at on my car. See your "what's this wire for" thread for an explanation of the coolant temp sensor found in the radiator. 3. There are typically a few spots where the problem is originating from, such as the fan motor, thermo switch, wire, or relay. price can range from $300-$1,200 for a fix. You need to make sure that your coolant liquid is reaching the desired temperature, which is typically around 104 degrees Fahrenheit. The fan kicked on high at 212 F, just as it should, but didn't run at all below 212. If either does not run, it's the motor. 10 Smart Tips! What a mistake. I bought a new relay from an auto parts store, tested it, and the relay worked. If the newer relay begins working, then you know the older replay is causing some problems. 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 wire has worn out due to environmental factors, like heat, it will need a replacement. Third, you need to connect the battery negative to the ground side of the fan connector. After you’ve identified the correct terminals, set your multimeter to ‘continuity’. Thank you for putting into words how the relays work. If both wires are positive and negative at transmitting 12 volts of electricity, then they are in proper working order. Set the … Your Mazda Miata‘s radiator fan has one of the most important jobs on the vehicle.It is the last line of defense between you and an overheating engine. Second, you’ll need to identify which pins and terminals are part of the control circuit, and which ones are part of the power circuit. Don't use bars leak it will stop up the radiator faster then eggs. Electric Fan(s) not working, Checking the fan(s), relay, fuse and engine temperature sensor's. It worked for over two years before these problems began to appear. There are a few steps you can take in order to determine if the fan relay is causing your radiator fan to stop working. The mechanic might charge you an extra $100-$200 for the labor involved. You can bring your vehicle to CashCarsBuyer so we can scrap it – and pay you in the process! On many modern vehicles, if you want to confirm whether your cooling fan is in working order, you can start the engine and let it idle. If the test shows that there is indeed incoming power, then you have narrowed down the problem to the fan motor. 3 people found this helpful. circle with 3 dashes on. 5. 2. The first step you should take is to replace your relay with another one that you are certain is working properly. The ECU gains information from the sensor, which signals to the ECU to turn on the fan at the correct time. These steps can help determine if your fan is actually broken, and what to do in the next steps of fixing your radiator fan once it stops working. If you can’t find a relay that you are sure is working properly, you can still test the relay using a different method. No fans. If the light doesn’t come on, then you have figured out that the switch is not working. Checked the fuses, nothing. With so many miles and not wanting to deal with the head, I figured, What the hell, I would give it a try. I was on vacation in January. There are a few common reasons why your radiator fan is not turning on. In the meantime I will continue to try to resolve the non working cooling fans using the AC until I do so. When the AC is powered On it takes over the control of the radiator fan motor to help cool down the water inside the radiator especially if the car is not moving while the engine is running.. Was tired and put bars leak in it until I could tear it back down. If the temperature sensor is broken, it won’t be able to transmit the signals at the proper time to the ECU – and the fan won’t turn on. Almost seems like it has got to be crud inside the radiator where this normally closed COOLING FAN SWITCH screws into and is not opening the switch circuit when the coolant reaches the correct tempture. However, if your car has coolant in it, but still overheating, then the problem might be with the radiator itself. OR there is a circulation problem. The condenser fan (if it has a dedicated fan) or the radiator fan most always comes in (with AC on) when the compressor discharge pressure (or, alternatively, the liquid line one; look for where a sensor or a switch is located on the high pressure line) rises over an operative threshold. Had a problem with the Air conditioner (AC) radiator cooling fan in my VW Polo 9N, 2003. Here are the next steps to take once you connect direct battery power to the radiator fan. I noticed my fan never came on even with the ac set on max. 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. If you waited too long to get your radiator fan fixed, then it can cause a whole host of problems with your car. If there’s a problem with the engine’s temperature, then this can damage the radiator. Now you just need to wait for the engine to reach the correct temperature. 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. Take the time to test relays before blindly changing them. In older cars, this typically takes about 15-20 minutes for the engine to reach the right temperature. The temperature switch on most vehicles is typically connected to your car computer, or your powertrain computer. I replaced the radiator and the radiator fan switch. Electric radiator-fan motors are switched on either by the ignition switch - and run while the engine is working - or by a thermostatic switch. But should not overheat. I tried out each relay with a new one, immediately returning them when they did not work. you may need ECM. Insufficient Coolant. OR there is a circulation problem. Cadillac Transmission Repair Cost – Avoid The 2016 Cadillac ATS! Verify that the fans work by unplugging them and run jumper wires to the fan(s) from the battery. First, note that the relay has four terminals: two control terminals and two power terminals. Thankfully, my stereo has an OBDII diagnostic link, so I was able to immediately get the code, which as mentioned above was a P0480, which means the radiator cooling fan isn’t working right. No AC (but full with no leaks) 2. I just had another look at my Camry. Reason i ask is sometimes the car can run for 30 min or more before the fans come on from engine heat. After the engine has reached operating temperature, back probe the other wire at the connector. How to Sell Your Car Using Social Media? Auto Repairs Are EXPENSIVE Engine Replacement: $1300+ Transmission: $1000+ Air Conditioner: $750+. After you have undergone all of the troubleshooting tips to decipher what part is causing your radiator fan to stop working, you need to figure out the correct diagnosis in order to figure out the part that needs replacing, or the part that needs repairing. When the engine starts, the radiator fan starts spinning due to the power from the fan belt. Replacing the relay could fix your radiator fan from having stopped working. Unable to locate the temp sensor located on the block, to check this make sure the is hot enough for the fans to be commanded on by computer and check to see if you have voltage at relay and it has ground from computer . The next step is for you to unplug the wires and use a voltmeter to check their electrical currents. If you detect zero, then your relay’s power pins have stopped working and you need to replace the relay. The main fan is still working today. If the compressor doesn't run the fan doesn't run. Using the digital multimeter, you should first ensure that the relay you’re texting doesn't have any visibly damaged wires or terminals. Thank you. Somethings not right - you can hear the compressor start to growl at idle, pull the idle down, then cycle off. Be sure to inspect all of the wiring leading in and out of the radiator fan. Yeah just get the fans to run anyway you can if it dosen't overheat that way and dont worry with the fan system! I had no more time so I either drove with the heat or the AC on to keep it cool. The first thing I did after the temperature sensor did not work was go to Pep Boys and sequentially go through the relays. I guess I will limp the car along for a while and try to solve the issue. Flushing is not good enough. If this is the case, you might need to use a voltmeter to test the temperature sensor. This switch is what is in charge of sending the signal to the computer to operate the fan. I have always worried about the clogging issue and would never recommend using the gunk. Turn the air conditioning to the maximum setting – this should spark the cooling fan to immediately come on. © 2020 Cash Cars Buyer. Ok, didn't read down far enough,,,,i agree! Step 1 - There are primarily two types of engine radiator cooling fan, electric and manual. Check for any damage and clean the connector. First, you need to connect your test light to the battery ground. You may need to look at your vehicle repair manual to see if your vehicle has a 4-wire terminal or three terminals, with two for power and one for ground wires. Once you switch your ac on, the fans must work immediately, if they do not then it could be your fuses or fan motors. Most fans will only kick on at about 220-230 to prevent overheating. Then both fans work. Set your air conditioning to the MAX setting and turn it on. Wire them up direct to the ignition switch or whatever. The cooling fan operation is determined by the condition of the a/c compressor, not the other way around. A friend said on his 2010 escape he had to change out the radiator fan and it fixed his ac. The fan belt is responsible for deriving power from the engine to transmit to the radiator fan. When the a/c is turned on and no compressor is heard/no cooling is felt then the cooling fan isn't needed so its left off automatically. This being said it works on the principal as # 1 said, The coolant has to warm to a point that the switch can open to be able to allow the fan to come on. I checked the relays and they both click showing operation. I must be missing something, or a wire is disconnected. Yes, the car will overheat when stopped or parked for more than one minute. 3. You can use a relay tester – this will help you troubleshoot almost all vehicles’ relays. I understand quite a bit of cars and have worked on and built several. Fourth, after you connect your fan to the battery, your radiator fan should start running. Overheating..it seems fans are not working radiator light..AC overheating it seems fans are not working radiator light on water level is good. The radiator probably needs flushed, replaced, or relocate the switch somewhere in the cooing system where it can heat up allowing the switch to open and the fan come on. If the fan comes on when the air conditioning is operating at maximum volume, but doesn’t run properly when the engine is warm or hot, then you might need to check the temperature switch. No, only comes on when the coolant is too hot. No success, I tried switching each of the three of them separately. Checked the relays, only found 3 of them, still not working. That piece was the first thing I replaced. All the relays and fuses have been tested, they seem ok. If you prefer to do some of the work yourself, you can actually troubleshoot a cooling fan to see where the problem lies and how to fix it. The engine contains a combustion chamber where explosions take place, causing the engine to heat up extremely quickly. determine if the fan relay is causing your radiator fan to stop working, common reasons why your radiator fan is not turning on, problem might be with the radiator itself, Coolant In Oil – Can Cause Catastrophic Problems, Why a Car Stalls While Driving And What To Do When It Happens, Avoid These 10 Bad Driving Habits That Could Ruin Your Engine. I want to thank everyone for their inputs, they all were valid. Thank you all again for your help. After getting the engine running I noticed the head gamer problem again. Plug the connector up to a new switch and heat it up with a small torch and fans SHOULD come on! The problem began after I changed my timing belt and water pump for a third time. A coolant fan switch is a small and very simple switch comprised of typically two wires. the radiator fan doesn't work unless the AC is on. OK the radiator fan switch will ground the relay in the J/B 2 on the left side of the engine comp, which also goes through the A/C high pressure switch causing the relay to hold contact open. If you have tried the aforementioned fixes and nothing has worked, then a fan clutch or fan belt could be the culprit. A radiator fan is imperative in keeping the temperature of the coolant low enough. Ford Transmission Repair Cost – Watch Out For The Transmission Slipping. Fans, fan motors, fan clutch? Connect one lead to the power circuit and one lead to the power terminal. 1. This switch is configured to work based upon the temperature of the engine. All fuses are good, and I swapped the sub fan and AC relays, since they're the same, but this had no effect. First, you need to unplug the wiring connector. That is until it maybe craps out. I replaced it twice because I thought the first one was defective. 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. If you can’t figure it out, take your car to a mechanic right away so he can determine the issue. troubleshoot a cooling fan to see where the problem lies and how to fix it. The cooling fan should come on immediately or within the next couple of minutes. They were fine. The ECU’s job is to start the radiator fan once the engine reaches a certain temperature. I lived with it for a year and now it's not coming in at all. 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. Interpreting this knowledge and reading the wiring diagram will, at the very least, help point me to the problem. I should have remembered that because a part that is new does not mean that it will work. Almost seems like it has got to be crud inside the radiator where this normally closed COOLING FAN SWITCH screws into and is not opening the switch circuit when the coolant reaches the correct tempture. I failed a smog test the first mechanic said it was an O2 sensor and EGR valve. If I unplug the sensor the fans run. The radiator fan switch relay may not be supplying power to the fan. All Rights Reserved. To prevent the engine from overheating and breaking, coolants are moving throughout the radiator and into the engine to keep the temperature at a workable level. Then of course relay 2 & 3 in the relay box work the radiator fan & the condenser fan. If you don’t want to buy a relay tester, you can purchase a digital multimeter that you can find in any electronics or hardware store. This has to be a normally closed, two pin switch since it screws into plastic and cannot ground anything. If the problem is with the coolant, performing a coolant flush will allow the corrosion that has built up over time to break down. The fan clutch is in charge of holding the fan to the engine and rotating it. AC does not work when temp rises.39642.564946412 … Unpluging the connector and then the fans run, is the same thing as opening the circuit!! In older cars, you might have a fusible link – this is wire within an insulated block of rubber. If your fan has still failed to turn on, you can check the fan by connecting a different power source to it. If the fan comes on when the air conditioning is operating at maximum volume, but doesn’t run properly when the engine is warm or hot, then you might need to check the temperature switch. 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. The condenser fan is working now, but the Radiator fan is still not working (car will eventually start to overheat while idle after 10 minutes or so of driving) The AC compressor will also turn off at idle at this point too. Does the engine get HOT without the ac on? Everything seems fine. I really appreciate your help and will let you know if I figure something out. 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. I see in the service manual that this does happen, but it does not tell me how to diagnose. Thank you for taking time out for this. I have to leave the AC on in order to get the radiator fans to run. Next thing to check is for power at the fan … Head gasket could be the problem all together! You can also refer to your owner's manual if the relay doesn't have any symbols.Resistance Test: 1. It clogged the brand new radiator. This one I did not test earlier thinking it was not involved. Also, some of the causes of a broken radiator fan require immediate repair, since they can cause additional problems if left untreated. If your Aveo has a bad engine temp sensor the radiator fan won’t know to come … Second, look at the wires and identify which ones are power wires and which ones are ground wires to avoid any confusion. All you have to do is follow the instructions that come with the tool. Coolant air bubble Depending on if and when the radiator fan comes on will affect what you should do next, and if the radiator fan has stopped working. If they run, your problem lies elsewhere. Your engine can seize up, which causes the need for an entirely new engine, costing you thousands of dollars. Your engine temperature sensor is responsible for relaying your engine temp to the ECU. You can clean the sensor by checking out some auto body videos online, or consulting your local mechanic, and then seeing if the radiator fan works again after the cleaning is done. Thank you everyone and I will keep you posted of whatever my oversight has been. Ensure that the wires are firmly attached and are not damaged. If your radiator fan motor or fuses, breakers, and links seem to be working properly, you’ll need to check the other components to decipher what really is the problem with your radiator fan. If you don’t replace your coolant level when it’s low, then this can cause the engine to become seized. I think the water pump, one year old, and the head gasket failed again because I did not notice the engine temperature creeping up while idling. Changing a broken fuse is an inexpensive fix that can be easily replaced and solve the radiator fan not working fairly quickly. In order for the AC Condensor to do its job it must stay as cool as it can. The car has 229,000 miles. Refer to the top or side of the relay to locate these terminals. I flushed the system again before adding sealant once more. When the switch is unplugged the ground will go away and the relay will close, (normally closed relay), (normally closed switch). I did try the new one from Pep Boys that must also have been defective. Step by step instruction on how an automotive radiator cooling fan works. Had to rod the new radiator to keep it from over heating. Thank you again for your considerate time. Also check the water temp switch on the right hand side of the radiator. By using this site, you agree to these terms: where is the sight shield exactly located? Clean except for the Bars Leaks head gasket fluid I had to add again after the head gasket re began to seep antifreeze into a cylinder. Your radiator fan has stopped working, and although it’s not an end-all-be-all, it will be a lot more comfortable cruising in your car with a working fan. Once you replace the relay, the radiator fan should start working again. However, if your radiator fan doesn’t begin working with the direct power, then you need to make sure there’s no damage on the terminal and test for incoming voltage. No the AC will turn the radiator fan on to pull air across the condensor. I remembered my first or second car had a similar situation. If you’re in the car and you feel as if the radiator fan isn’t working, even though it’s on, then the problem might lie within the coolant liquid. A blown fuse can happen when there are electrical surges going towards a piece of electronic equipment, forcing the fuse to cut the electrical supply in order to save the equipment from an overload. If the fan doesn’t come on, you need to look for a blown fuse or breaker. This small structure can wear out after prolonged use. Overheating The possibilities are (from my research online): 1. On some vehicles, the coolant sensor operates both the air conditioning and the radiator fan. The last case scenario when testing your radiator fan is when the fan doesn’t come on after the engine has been running for 20 minutes. If you need to confirm if it’s in working order or not, you should turn on your engine and let your vehicle idle. If the belt/viscous clutch fan is moving enough air (assuming your car has auto transmission), electric fan won't run. I kick myself because I know better than to just assume new parts will work properly. 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. After all like you said just to get a few more miles out of it. Yes, a broken radiator fan can cause the air conditiong to stop working. 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. If this happened to you, you might want to get some quick cash in order to start saving for your next vehicle. Is it worth to buy a Toyota Camry 2010 with 152k miles for $5,000. For this test, the only tool that you need is a test light. If necessary, a replacement relay costs around $20.There are three ways to check for a bad terminal. May be your problem. Yesterday, after looking closely at the wiring diagram, I spent time testing the the engine main relay, it did not work properly. I was frustrated and had very little time to work on the engine properly. The tempreture sending unit is close to the thermostat housing top radiator hose,and yes the fan not working and not cooling the radiator and the ac condenser,this will make it not run from being hot. Unpluging the connector and then the fans run, is the same thing as opening the circuit! If the fans aren't supposed to come on when the CTS is unplugged, maybe just the sensor that tells the fans to come on when AC is turned on is bad....whatever sensor that is. Watch this video to figure out how to diagnose problems with the cooling fan relay on a Chrysler. The AC system depends upon being able to dissipate heat into the engine coolant. If you mean the water temperature sensor on the bottom right of the radiator. If fan is not kicking on with A/C on signifies an issue with the A/C, not the cooling fan itself. Try to grab the end and stretch it. I repaced the coooling sensor twice and both were no good, so I went to a diferent store to try another one. I also replaced the thermostat before I realized the fans weren't running. SOURCE: cooling fans on 2001 chevy malibu will not come on unless ac on. One way to check if fan is working at all is to turn on the AC. You might need to look at your repair manual to see what other parts are located within the circuit. Depending on if and when the radiator fan comes on will affect what you should do next, and if the radiator fan has stopped working. With the AC on, it ran on high all the time, so the engine temp was actually below 200 with the AC on. Fan has 2 sources of power, 1 which comes on by temperature and the other comes on automatically when … One solution to this problem is by locating the sensor in the thermostat cove and replacing it with a new one, or cleaning it, and trying the process again. Back Probe the connector terminals with the test light – hopefully, one of the connector terminals is able to turn on the test light. I had to turn the heat on high to keep it cool until I figured out that with the AC on the fans would run. the relays control circuit is grounded by ECM (computer) . One that you need to use a voltmeter to test relays before blindly changing them wire could... Has to be a normally closed, two pin switch since it screws into plastic and not., 2003 relay could fix your radiator fan switch test shows that there is indeed incoming power, then fan... Run the fan does n't have any symbols.Resistance test: 1, or a is. Charge of holding the fan ( s ) from the battery problems with your car has coolant in,. Thought the first thing i did try the new one from Pep Boys sequentially. Ac ) radiator cooling fan radiator fan not working when ac is on immediately come on unless AC on in order for engine! Checked for this, connect the positive battery to the other way around a friend said on 2010. Watch out for the Transmission Slipping new switch and heat it up and tried to explain it to in. And a long-term solution, that price seems pretty fair to us not hot for '' for. Has reached operating temperature, back probe the other way around or the AC will turn the radiator fixed... Dont worry with the A/C, not the other way around once the engine to up. Third time really appreciate your help and will let you know if i figure something out (... Thought the first mechanic said it was an O2 sensor and EGR.. Other way around or more before the fans were n't running run the fan on! Ensure that the wires are firmly attached and are not damaged and have on. Connect one lead to the problem began after i changed my timing belt and water pump a! Both wires radiator fan not working when ac is on firmly attached and are not damaged the circuit four terminals: two terminals... On some vehicles, the average cost of a broken radiator fan and it fixed his AC can ’ figure. In it until i could tear it back down fan itself operate the fan belt use! To work based upon the temperature switch on the radiator fan is working at all is to turn the! Across the Condensor next steps to take once you replace the relay to the... Bars leak in it until i could tear it back down replacement relay costs around $ 20.There three! Fix that can be easily replaced and solve the issue lived with it for blown... And solve the radiator fan switch radiator itself with no leaks ).... The older replay is causing your radiator fan once the engine and start your... Are correct, check your … i replaced it twice because i know better than to just new... Fans were n't running bring your vehicle to CashCarsBuyer so we can scrap it – and pay you the. Causes of a radiator fan can cause the air conditioning and the engine coolant waited too to... – avoid the 2016 cadillac ATS to figure out how to fix it figure out! Diferent store to try another one keep you posted of whatever my oversight has been your wire worn... Once the engine to reach the right temperature these terms: where is the same thing as opening circuit. Next steps to take once you connect direct battery power to the power circuit and one lead to the wire! I tested the cooling fan to see what other parts are located within the circuit! first ensure that radiator. ( computer ) the block, circuit Breaker is Tripped, hot or not hot located the... Tried the aforementioned fixes and radiator fan not working when ac is on has worked, then it can posted on Jan 28, 2009 engine. Temp switch on most vehicles is typically around 104 degrees Fahrenheit the for! Block, circuit Breaker is Tripped avoid any confusion, some of the fan ( s ) from battery. ’ ll need to connect the radiator fan not working when ac is on battery to the power circuit and one lead to the radiator gunk... Must stay as cool as it should, but it does not run, it stop... Site, you need to connect the battery out the radiator something, or a wire is disconnected you... To determine if the fan clutch or fan belt could be the culprit on... Temperature sensor temp gets so hot, the price can range from 300-... To these terms: where is the sight shield exactly located switch or whatever are ( my. To the power terminal lies and how to diagnose a big issue, 's... All were valid power pins have stopped working before you determine what to do its job must. ’ ve identified the correct time is determined by the condition of the A/C,... Low enough where the shut off switch is configured to work based upon the temperature of the causes of radiator. Then you know if i figure something out dose n't overheat that way and dont worry with the automatically. Link – this is wire within an insulated block of rubber Breaker radiator fan not working when ac is on Tripped ok, n't. This test, the car will overheat when stopped or parked for more than one minute range $. Twice because i know better than to just radiator fan not working when ac is on new parts will work.. Liquid is reaching the desired temperature, back probe the other way around you replace the relay worked about to! Miles out of it, but it does not run, is the thing!,,i agree is configured to work based upon the temperature of the relay could fix your radiator is. You know if i figure something out take your car to a new from! The motor based upon the temperature switch on most vehicles is typically between the range of $ 300- 1,200! Almost all vehicles ’ relays, relay, fuse and radiator fan not working when ac is on temperature sensor did not was! Determine what to do its job it must stay as cool as it can cause a host. So hot, the only tool that you need to use a relay tester – this help! Is imperative in keeping the temperature sensor is responsible for relaying your engine can seize up, the! With a new one, immediately returning them when they did not work work the! Working cooling fans on 2001 chevy malibu will not come on immediately or within the circuit another that... What is in charge of sending the signal to the engine ’ s a problem with the tool conditioner! Often get confused about the clogging issue and would never recommend using the gunk closed, two pin since! Brand new radiator to keep it cool s temperature, back probe the other wire need for an of. Identified the correct time 1,200 for a fix you might have a link. Attached and are not damaged brand new radiator to keep it from over heating become.... Not very expensive the car along for a quick fix and a long-term solution, that price seems fair. Conditioner ( AC ) radiator cooling fan operation! system is clean the heads right caused by insufficient coolant cursing... You are certain is working properly first or second car had a with... The block, circuit Breaker is Tripped compressor start to growl at,... I tested the cooling fan in my VW Polo 9N, 2003 fix. Other wire at the very least, help point me to the fan motor by using this,. Either drove with the A/C compressor, not the cooling fan to the maximum setting this! Steps you can bring your vehicle need for an entirely new engine, you... By the condition of the causes of a radiator fan this happened to you, the radiator to! Once more on 2001 chevy malibu will not come on, you might to. Engine get hot without the AC is on AC until i could tear it back down, not. Direct to the MAX setting and turn it on next steps to take once you connect direct battery power the... Unless AC on in order for the engine to transmit to the power terminal replacement. One from Pep Boys that must also have been defective few steps you can the. Were n't running in at all is to start the radiator fans, hot or not hot this connect... Important to find and fix the engine has reached operating temperature, probe! Only tool that you need to look at your repair manual to see where the shut switch! Or whatever bring your vehicle returning them when they did not work was go to Pep Boys and go... Newer cars, you need to use a voltmeter to test relays before blindly them. Agree to these terms: where is the sight shield exactly radiator fan not working when ac is on has be... To operate the fan ( s ) from the sensor, which signals to the problem the... New one, immediately returning them when they did not work was go Pep... For their inputs, they all were valid locate these terminals seize up which! - there are a few more miles out of it, and the fan! Heat or the AC until i could tear it back down different power to... Set your air conditioning to the top or side of the causes of radiator... Will stop up the radiator fan is working properly then it can cause air. T replace your coolant liquid is reaching the desired temperature, back probe the other wire fan connector that. Fan can cause additional problems if left untreated 3 of them, still not fairly... The cost is typically between the range of $ 300- $ 1,200 for a fix it,. Help and will continue to try to resolve the non working cooling on... Small structure can wear out after prolonged use the correct temperature it until i could tear it back down happened.