Cooling fans seem to be running all the time. If the fans never work, it could be the cooling fan ECU (located behind the grill), but check the 50A fuse powering it, and the fan relay first. When your ac is on your low speed on the radiator fan should be running. Step 1 Open the hood and locate the fuse relay box on the drivers fenderwell. If the fan comes on, you may have a bad temperature sensor or gauge. The Radiator would turn on first thing in the morning and stay on. My Radiator Fan Wont Turn Off: 3 Actionable For You. As you may know the coolant fan relay turns the fans off and on by receiving information from the coolant temperature sensor at specific temperature thresholds. If your radiator is broken, your automobile fan may not turn off. If the fan still runs after unplugging both sensors, then problem might be with radiator fan control module located behind the glove box. My Radiator Fan Wont Turn Off: 3 Actionable For You>My Radiator Fan Wont Turn Off: 3 Actionable For You. Technically, a little coolant will dissipate little heat, and the temperature sensor will signal the ECU to turn on the fan and cool the engine. Save Like Herbalicious · #10 · May 24, 2011 Bimmer03330i said: Thts because it only spin when u drive!. Ensure that the wires are firmly attached and are not damaged. Broken radiator fan. 4 turbo wont turn on when it needs to. It would be better if you also looked for any leaks. The fans should not be constantly spinning. If an RPM is listed, test your fans directly connected to your motherboard. This fuse will blow in the event that its circuit is overloaded, shorts out, or has some other problem. My suspicion is that either that. Technically, a little coolant will dissipate little heat, and the temperature sensor will signal the ECU to turn on the fan and cool the engine. If an RPM is not shown, verify that your fans are correctly connected to your RGB & Fan Controller on the corresponding fan header on the controller. At higher coolant temperatures, the switch closes to start the cooling fans. If the high side spikes and the fans don’t turn on, I would suspect a problem with what is called the A/C pressure transducer (high side switch), one or both fan relays, the fan motors themselves, an ambient temperature switch or the sun sensor. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. Locate the thermo switch in the thermostat housing, and unplug the two-point connector. I tested them and checked them with a power probe. My Cooling Fan Wont Stop Running on My Radiator>My Cooling Fan Wont Stop Running on My Radiator. Fan Keeps Running (Solved). Turning on the AC automatically turns on the radiator fans, hot or not hot. If the radiator fan is still constantly on, it is most likely caused by the fan relay being stuck closed. Why is Cooling Radiator Fan Not Turning On How to …. 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. There are two types of systems in different car. The thermo switch (also called the cooling fan switch) sends a signal to the cooling fan, so the fan turns on if the coolant gets too hot. If the radiator fan is still constantly on, it is most likely caused by the fan relay being stuck closed. Technically, a little coolant will dissipate little heat, and the temperature sensor will signal the ECU to turn on the fan and cool the engine. It is a very common problem that results in radiator fan failure: the fuse may burn off or simply fall 2. Fan runs faster than normal and run when engine is cold. Defective fan relay The fan relay controls the power to the cooling fan. The radiator fan stays on when the engine is off. Check the engine coolant level. Here are the most common reasons that your radiator fan does not turn on: Before poking your hands around your fan, make sure to treat it like it still could come on, and and keep your hands out of its path. This is not a coolant flow issue, it is an electrical issueTwo electric radiator fans are standard factory equipemnt. Usually a faulty cooling fan relay will produce a few symptoms that can alert the driver that service may be required. At idle, or after car is turned off, if temp is above certain level, fan should come on to draw air through radiator. If the fan doesn’t stop running, plug that sensor back in and unplug the coolant temp sensor on the thermostat housing. Electric radiator fan wont shut off when vehicle is running. Because the radiator fan is frequently drawing such a lot of force, there is regularly a relay driving the coolant fan. Radiator Fan In Your Car Not Working? Heres Why, and …. The fan should run, the disconnected sensor will cause the ECM to use a default value of 212F for the temp sensor input, that should cause the fan to start. This was my procedure: Remove radiator cap. Checked the temperature switch with ohm meter - seems to be fine, resistance changes with temperature changes. Anyway after spending hours diagnosing where and why my fan was not running and about to rewire the fan power supply(my fuses appeared to be all in good shape) or so i thought. Usually a faulty cooling fan relay will produce a few symptoms that can alert the driver that service may be required. If it does, the temp sensor is the problem. We are using a Scangauge tool (OBD2 reader) to determine the engine temperature, and it matches up with the analog gauge on the dash. If the fans fail to operate only with the AC, but do come on in normal hot engine conditions, then the fuse and relays are fine - its a command problem at the ECU or the AC controller. Sienna radiator fans not working. We are using a Scangauge tool (OBD2 reader) to determine the engine temperature, and it matches up with the analog gauge on the dash. This can lead to overheating, especially when the vehicle is at a stop, where there is no forward motion by the vehicle to pass air over the radiator. The radiator fan relay Low coolant level. As for overheating, its probably due to your air/fuel ratio being too far off. 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. Check Your Coolant Level. Keep in mind that the A/C is completely off during this time. You do need a new fan before it rubs a hole in the radiator. WHY RADIATOR FAN STAYS ON ALL THE TIMEIf your radiator fan stays on all the time when the car is started or with the ignition being on we will explain what i. The radiator and A/C condenser fans are triggered by high coolant temperature or when the A/C is turned on. When the computer sees these extreme pressures it turns the high speed on to the radiator fan bringing the pressures down to normal. If one of them is faulty, your engine might continuously read that the coolant is hot, resulting in a running fan. We think the computer is not turning on the fans at the right time. Just had to replace my battery as well and I replaced my other relay inside my fuse panel. Radiator Fan Wont Turn Off: 2014 - 2019 Silverado & Sierra: Bad Coolant Temperature Sensor Replaced The Brothers Workshop 43. A radiator fan that is constantly on may be triggered by the air conditioning when it is on. Satsuma radiator not working?. If the fan stops running replace that sensor. If the fans never work, it could be the cooling fan ECU (located behind the grill), but check the 50A fuse powering it, and the fan relay first. If the fan relay is stuck open, the fan will never turn on even if the sensor signals that it should. Blown fuse: This is the most likely reason for a non-functioning electric radiator fan. Either clean them with a sensor cleaner or replace them with new ones. Radiator Fan Wont Turn Off: 2014 - 2019 Silverado & Sierra: Bad Coolant Temperature Sensor Replaced The Brothers Workshop 43. Radiator Fan Not Working: Reasons Why, How To Check, & Fixes. Replace the fan relay. 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. Also remember if your defrosters are on that the compressor is running which also causes the fan to run. If it is blown, replacing the fuse will only solve the problem for a very limited period of time. When your ac is on your low speed on the radiator fan should be running. The fan relay is regularly in the motor bay’s circuit box, yet the most effective way is to look at your repair manual to observe where it is located. If that all looks good, you need to find out why the temp is so often high enough to bring the fan on line. Radiator Fan In Your Car Not Working? Heres Why, and What to Do About It. My Cooling Fan Wont Stop Running on My Radiator. Chevrolet Cruze Questions. Wiring The first thing that you would want to do is locate the fuse for your Forester’s radiator fan and make sure that it hasn’t blown. If there were to be a problem with the splice in the fuse/relay box that disconnected the power feed to the fan motor that would explain why neither low nor high speed would work. Anyway after spending hours diagnosing where and why my fan was not running and about to rewire the fan power supply(my fuses appeared to be all in good shape) or so i thought. SOLVED: Electric Radiator Fan Does Not Come On. Generally located by the thermostat housing, this should be the first thing to check and replace since it is easy and inexpensive. Radiator Fan Not Working When AC Is On: Causes and Fixes. Unhook the fan connector at the sensor, at the radiator. The coolant flows past the thermostat so that should rule out thermostat or water pump issues. The thermo switch (also called the cooling fan switch) sends a signal to the cooling fan, so the fan turns on if the coolant gets too hot. Be sure the air conditioning is off. The radiator fan not working may cause your engine to overheat, especially if this happens during a hot summer day. The radiator fan not working may cause your engine to overheat, especially if this happens during a hot summer day. Theres a number of reasons your. Radiator Fan Relay. Ok so, I thightened the fanbelt to the max. I checked the Engine Coolant Temp. The last probable culprit on the list will surprise you. Step 3 Replace the cooling fan relay with a new one. Turn engine on with the funnel kit attached and excess fluid. Radiator Fan Not Working: Reasons Why, How To …. If you see the engine heating but the radiator fan isn’t, the fan wires could be the culprit. If there were to be a problem with the splice in the fuse/relay box that disconnected the power feed to the fan motor that would explain why neither low nor high speed would work. Radiator Fan doesnt turn on. If the problem of the radiator fan not working still persists, you can check the fan by connecting a different power source to it, that is direct battery power. Do not think the grounds need cleaning because when we unplug the. Reasons your radiator fan isnt working Fuse issues. A radiator fan that is constantly on may be triggered by the air conditioning when it is on. If the fan stops running, replace that sensor. The power draw would leave little to other parts of the car. Yes, the radiator fan should start blowing when you turn on the air conditioning system. My fans arent coming on when I turn on my car or when the car reaches over 200 degrees F. If the radiator fan is still constantly on, it is most likely caused by the fan relay being stuck closed. Fans not working with RGB & Fan Controller. This was my procedure: Remove radiator cap. It’s conceivable that the radiator hoses and piping have become corroded. Any time the coolant temperature rises to higher than normal levels, the fan will start and continue to run until coolant temperature returns to a normal range. To identify why the radiator fan wont shut off, you may also inspect your coolant level to see whether it is insufficient. Your Radiator Fan Stopped Working. If it doesnt, the fan is the culprit. SOLVED: 2006 chevy Silverado Electric cooling fans …. If your engine coolant’s too low, it means that the cooling fan will have to work harder to keep the engine at a normal temperature. Wait till my radiator fan turns on. Your vehicle’s top and bottom radiator hoses are likely to fatigue and strain. Faulty Coolant Temperature Sensor. you actually have to drop the fuse box out of dash and remove a few plastic. Step 1 – Check the fan switch relay The radiator fan switch relay may not be supplying power to the fan. Refill with honda coolant till full. If the cooling fans are staying on at all times, this is another (less common) symptom of a possible problem with the cooling fan relay. Your vehicle’s top and bottom radiator hoses are likely to fatigue and strain. If an RPM is not shown, verify that your fans are correctly connected to your RGB & Fan Controller on the corresponding fan header on the controller. If the fan doesn’t stop running, plug that sensor back in and unplug the coolant temp sensor on the thermostat housing. The online chilton manual has the diagnostic steps to help you further. The radiator fan not working may cause your engine to overheat, especially if this happens during a hot summer day. Engine running hot One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. Check to see if you have a relay sticking closed. Wiring The first thing that you would want to do is locate the fuse for your Forester’s radiator fan and make sure that it hasn’t blown. The wiring harness itself can go bad. My questions: 1) Both fan should turn on with the A/C, right? 2) Does each fan have its own separate temperature sensor? Where do I find the sensor?. The sensor is usually located in the. Anyway after spending hours diagnosing where and why my fan was not running and about to rewire the fan power supply(my fuses appeared to be all in good shape) or so i thought. When the engine is warmed up, but the fan is not running, the temp should be about 195°F to about 215°F. Posted: Oct 21, 2019. Relays and fuses are good as well. Since it is not the high side pressures go extremely high. Summer can be really harsh on cars. If the motor fails, it won’t power the fan blades to spin. The cooling fan relay is the relay that controls the engines cooling fans. When the engine is warmed up, but the fan is not running, the temp should be about 195°F to about 215°F. Also applies if you have it in auto. Most cooling fans use electric motors that have a moderate to high current draw, and as a result are commonly controlled using relays. If the fan still runs after unplugging both sensors, then problem might be with radiator fan control module located behind the. This part can get really complicated, but the first thing to do is run the A/C with gauges connected to observe the system pressures and monitor the circuit from the PCM to the relays. A fuse handles almost everything electrical in a car. This relay can get damaged, which will cause the radiator fan to not come on. Radiator Fan In Your Car Not Working? Heres Why, and What to. The reason for turning the heat on high and the fan on low is to get the coolant flowing through the heater core and eliminating any air bubbles also, low fan speed is to keep the temp up as the heater core is just a radiator and putting the fan on high will keep the temperature lower and may not start the cooling fans. Inspect both sensors to make sure they are clean and in working condition. RADIATOR FAN WONT SHUT OFF? EASY FIX. Simply unplug both the wires, negative as well as positive. Periodically the A/C condenser fan would turn on and off to cool the engine, but nothing happens with the radiator fan. Radiator Fan wont turn ON. My fans arent coming on when I turn on my car or when the car reaches over 200 degrees F. If there is an electrical surge going toward a 2. When my car overheated and the temperature was on ~130 the fans still didnt spin. When I unplug the fan (AC off) after the overheat warning and plug it back in, it turns on for a second and then turns off. You need to check your radiator fan relay. Periodically the A/C condenser fan would turn on and off to cool the engine, but nothing happens with the radiator fan. At higher coolant temperatures, the switch closes to start the cooling. The fan should come on instantly. Replace the cooling fan relay with a new one. Because the radiator fan is frequently drawing such a lot of force, there is regularly a relay driving the coolant fan. In order for the AC Condensor to do its job it must stay as cool as it can. 4 turbo wont turn on when it needs to. Honda Accord Why Does Fan Keep Running After Car Turned Off. If the fans never work, it could be the cooling fan ECU (located behind the grill), but check the 50A fuse powering it, and the fan relay first. If those fans still do not spin up, the fans being used are defective. For example, the radiator fan relay can be frozen in the on position. no codes come up and i have put new thermostat in and 2 new temp sensors in, checked all 5 relays and all fuses, fan does work now(it didnt) when i turn airconditioning on, but the low speed of fan doesnt stop engine from over heating. A stuck closed relay is the only thing that can operate the cooling fan continuously with the key off. • A/C refrigerant pressure exceeds. All this because the fan controller is not running the low speed anymore. There is a little black box on top of the cooling fan, at edge of good. There are three ways to check for a bad. radiator fan every 20 to 30 seconds comes on for about 5. The sensor is usually located in the car thermostat cover. As a result, the fan runs wild. Radiator Fan Not Working: Common Causes 1. Fan motors- work fine (connected them directly to power source) 3. The most important piece of the cooling system is the fans. A radiator fan that is constantly on may be triggered by the air conditioning when it is on. If the fan stops running, replace that sensor. To check the level, look for the coolant expansion tank in the engine bay. Why does my radiator cooling fan stay on even when I turn the ignition off. The fan relay is regularly in the motor bay’s circuit box, yet the most effective way is to look at your repair manual to observe where it is located. The cooling system is saving your car from overheating during the whole summer. Radiator Fan Not Working: Common Causes 1. There is no belt-driven fan on this vehicle. To identify why the radiator fan wont shut off, you may also inspect your coolant level to see whether it is insufficient. Replace the thermostat and clear all the codes, should fix the issues. radiator fan not turning on after coolant change. A fuse handles almost everything electrical in a car. Fan Does Not Turn on Until 235F. When the correct parameters are met, a temperature switch or. Q: Radiator fans wont turn off unless I turn off the car, why?. The electric radiator cooling fan assembly is controlled by a thermoswitch located in the side of the radiator. 2K subscribers 375K views 1 year ago UNITED STATES Welcome. If it is open then that is your problem otherwise you might have an issue with the TIPM circuit board. To check it, disconnect the wires from the sensor and touch them together. 69K views 1 year ago Here I show you how to diagnose and test why your radiator or cooling fan is not coming on in your car. The reason for turning the heat on high and the fan on low is to get the coolant flowing through the heater core and eliminating any air bubbles also, low fan speed is to keep the temp up as the heater core is just a radiator and putting the fan on high will keep the temperature lower and may not start the cooling fans. Your engine temperature sensor is responsible for relaying your engine temp to the ECU. It can also be caused by a faulty coolant temp sensor, low coolant level or the fan itself can be damaged. Unhook the fan connector at the sensor, at the radiator. Fuses act as a shield on electrical and electronic components. Step 1 – Check the fan switch relay The radiator fan switch relay may not be supplying power to the fan. Blown fuse: This is the most likely reason for a non-functioning electric radiator fan. If your radiator is broken, your automobile fan may not turn off. When the fan kicks on, the temp should be above 215°F, then begin to drop to 195°F, where it will shut off. One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. Why Wont My Radiator Fan Turn OnIf the fan still runs after unplugging both sensors, then problem might be with radiator fan control module located behind the. 69K views 1 year ago Here I show you how to diagnose and test why your radiator or cooling fan is not coming on in your car. The one that controls the power to the cooling fan is the fan relay. Theres a number of reasons your cooling fan is not cutting on,. I have the same problem with my Golf MKIII, my radiator fan wont switch off even after the engine is off, i have changed fan switch 3times, even replaced a new thermostat but the problem persists. RADIATOR FAN WONT SHUT OFF? EASY FIX. Symptoms of a Bad or Failing Cooling Fan Relay. This relay can get damaged, which will cause the radiator fan to not come on. radiator fan doesnt comes on till I turn ac on. As with many of your cars electrically-powered systems, the radiator fan circuit incorporates a fuse. What Causes the radiator fan not to work when ac is on? A blown fuse. A cooling fan temperature switch (or sensor, in some vehicles) can also get stuck, which may cause. If the fan stops running replace that sensor. If your radiator is broken, your automobile fan may not turn off. relays 28, 29, & 30 respectively. Step 1 – Check the fan switch relay. Operating the fan is a decision with many variables, and in a well-designed system it happens when hot outside and not moving, and perhaps after a delay (the radiator. Step 1 Open the hood and locate the fuse relay box on the drivers fenderwell. The radiator fan switch relay may not be supplying power to the fan. Because the radiator fan is frequently drawing such a lot of force, there is regularly a relay driving the coolant fan. Take a voltmeter and check for the presence of current. It has a couple relays inside it. If necessary, a replacement relay costs around $20. If the problem of the radiator fan not working still persists, you can check the fan by connecting a different power source to it, that is direct battery power. If it’s not working, the fan won’t turn on when it needs to, which means the engine might overheat. WHY RADIATOR FAN STAYS ON ALL THE TIMEIf your radiator fan stays on all the time when the car is started or with the ignition being on we will explain what i. Mel Martinez 162 subscribers Subscribe 31K views 4 years ago How to fix Radiador Fan that wouldnt shut off,Honda, Nissan, toyota,. This can lead to overheating, especially when the vehicle is at a stop, where there is no forward motion by the vehicle to pass air over the radiator. Radiator Fan Not Working When AC Is On: Causes and Fixes>Radiator Fan Not Working When AC Is On: Causes and Fixes. This was my procedure: Remove radiator cap. At higher coolant temperatures, the switch closes to start the cooling fans. A radiator fan that is constantly on may be triggered by the air conditioning when it is on. The relay, however, has direct power to one side, the same as a light switch. If this is not the issue the temperature sensor or ECU may have a problem. Radiator Fan Wont Turn Off On Chevy Silverado 1500. By this, they protect corresponding Bad temperature coolant sensor. My suspicion is that either that splice/connection is bad or the ground, G201, is bad. The cooling fans have an electric motor inside that powers them to spin. Engine Cooling fan not turning off. Volkswagen Jetta Questions. The radiator and A/C condenser fans are triggered by high coolant temperature or when the A/C is turned on. The Fan works when I turn the AC on 2. The tenth possible problem could be your radiator fan relay. Cooling fans stay on at all times. If an RPM is not shown, verify that your fans are correctly connected to your RGB & Fan Controller on the corresponding fan header on the controller. If necessary, a replacement thermo switch costs between $10 to $40. Once the temp gets so hot, the ECU commands the radiator fan to come. We replaced one of them and so far I haven’t had a problem. check relay 18if it works then check the fan resistor. What Can Cause A Radiator Fan To Stop Working? 1. WHY RADIATOR FAN STAYS ON ALL THE TIMEIf your radiator fan stays on all the time when the car is started or with the ignition being on we will explain what i. Are they running at low speed or high speed?. If that all looks good, you need to find out why the temp is so often high enough to bring the fan on line. You may have noticed the engine fan always on because your car is taking extra time to warm up. The fan should run, the disconnected sensor will cause the ECM to use a default value of 212F for the temp sensor input, that should cause the fan to start. The temperature sensor is bad. There are usually two marks on it – a minimum and maximum level mark. If there were to be a problem with the splice in the fuse/relay box that disconnected the power feed to the fan motor that would explain why neither low nor high speed would work. Many car manufacturers direct the powertrain control module to oversee the overall No or low. Defective fan relay The fan relay controls the power to the cooling fan. The transducer is another story. sensor could also be defective telling the computer that he engine is too hot all the time. When this happens you will notice a temperature. Engine Fan Does Not Turn on Until 235F. Yes, the radiator fan should start blowing when you turn on the air conditioning system. If the sensor isnt working, your fan wont come on because it wont know that the temperature is hot enough to require activation, which can frequently lead to overheating. A low speed, a Series/Parrallel, and a high speed. Step 1 – Check the fan switch relay The radiator fan switch relay may not be supplying power to the fan. If an RPM is listed, test your fans directly connected to your motherboard. It may cause the fan to cut in and out, or not come on at all. Radiator fan not coming on. Most cooling fans use electric motors that have a moderate to high current draw, and as a. Usually only when the engine reaches a certain temperature. Sensor and tested the Thermoswitch (cooling fan switch mounted near bottom of radiator) and they are both good. A wiring issue Faulty wiring could be to blame. When this relay is not working properly, this can cause the fans to come on intermittently, stay on all the time or sometimes not at all. Fractures in the radiator are probably the source of the issue. The standard direct current they must put out is 12v (approx. First, note that the relay has four terminals: two control terminals and two power terminals. As with many of Relay issues. Refer to the top or side of the relay to. 69K views 1 year ago Here I show you how to diagnose and test why your radiator or cooling fan is not coming on in your car. Radiator Fan Wont Turn Off: 2014. If the radiator fan is still constantly on, it is most likely caused by the fan relay being stuck closed. Any time the coolant temperature rises to higher than normal levels, the fan will start and continue to run until coolant temperature returns to a normal range. no codes come up and i have put new thermostat in and 2 new temp sensors in, checked all 5 relays and all fuses, fan does work now(it didnt) when i turn airconditioning on, but the low speed of fan doesnt stop engine from over heating. It is a very common problem that results in radiator fan failure: the fuse may burn off or simply fall 2. First, unplug the wiring connector. Sensor and tested the Thermoswitch (cooling fan switch mounted near bottom of radiator) and they are both good. Step 1 - Check the fan switch relay. If you see the engine heating but the radiator fan isn’t, the fan wires could be the culprit. So that the last step, I waited 10 minutes and it never turns on. Just being on the lower of the 2 lines is not low enough coolant to cause any temperature issues. Unless the wiring issue is fixed, the fuse will blow again. If the fan comes on, you may have a bad temperature sensor or gauge. The radiator fan only turns on when the AC is switched on because there is an issue with either of these components: Thermostatic switch Fan resistor Temperature switch High/Low-speed Relay Other wiring issues Clutch for the fans Faulty Fuse Coolant issues Radiator Fan Motor Not Working Correctly. When the engine is warmed up, but the fan is not running, the temp should be about 195°F to about 215°F. The computer looses power with the key off and the same applies to the coolant temperature sensor. Subaru Forester: Radiator Fan Not Working Diagnosis. If only one radiator fan is working, check the other one. 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. cooling fan for 2012 chevy cruz LTZ 1. The high-pressure switch is usually located under the air box. If the fan doesn’t stop running, plug that sensor back in and unplug the coolant temp sensor on the thermostat housing. Cooling fans come on immediately?. Here are the most common reasons that your radiator fan does not turn on: Before poking your hands around your fan, make sure to treat it like it still could come on, and and keep your hands out of its path. The fan relay may. There are two types of systems in different car models. Faulty High-Pressure Switch Always check your high-pressure switch even if it looks brand new. Radiator fan running a lot. and B: we have to figure out why the fans run all the time. Theres a number of reasons your cooling fan is not cutting on,. Radiator Fan Common Problems – When Should it be On?>Radiator Fan Common Problems – When Should it be On?. The thermo switch (also called the cooling fan switch) sends a signal to the cooling fan, so the fan turns on if the coolant gets too hot. Place a wire in the end of the fan connector and ground it to the frame/engine (with the key on). If the fans fail to operate only with the AC, but do come on in normal hot engine conditions, then the fuse and relays are fine - its a command problem at the ECU or the AC controller. I have the cauge for the Air/Fuel and its set to 14,2 on the normal carb with the twin carb its on 15,3. Bad relay: The relay for the radiator fan system is also found in the fuse box. you actually have to drop the fuse box out of dash and. A cooling fan temperature switch (or sensor, in some vehicles) can also get stuck, which may cause the fan to run continuously any time you turn the ignition key on or start the engine. If theres an issue with the relay, the fan will be affected. cooling fan for 2012 chevy cruz LTZ 1. The first thing that you would want to do is locate the fuse for your Avengers radiator fan and make sure that it hasnt blown. The Radiator would turn on first thing in the morning and stay on. If its not working, the fan wont turn on when it needs to, which means the engine might overheat. While these are some of the reasons, the list is not exhaustive. Radiator Fan Not Working? 7 Common Causes & How To Fix It. The coolant level should always. As a result, the fan runs wild. When the computer sees these extreme pressures it turns the high speed on to the radiator fan bringing the pressures down to normal. cooling fan for 2012 chevy cruz LTZ 1. If there are issues and defects with the relay, the car fan will get affected. WHY RADIATOR FAN STAYS ON ALL THE TIMEIf your radiator fan stays on all the time when the car is started or with the ignition being on we will explain what i. This will activate the vehicle’s cooling system, and the fan won’t. My radiator fans are not turning on, things I have checked are: 1. Electric fans dont spin that often. Fans wont turn off 3 Answers. radiator fan every 20 to 30 >Chevrolet Cruze Questions. The module is no longer telling when the fan to turn off/on anymore so it just bypasses the module and the fans stay on. Step 2 Look on the inside of the lid and for the mapping of the fuses and relays with their location. Also remember if your defrosters are on that the compressor is running which also causes the fan to run. The radiator fan switch relay may not be supplying power to the fan. Do not think the grounds need cleaning because when we unplug the coolant temperature sender, the engine automatically kicks all the fans up to high. 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. When the cooling fan fails to turn on both when the AC is on and off, the fan itself can be the culprit. Check for any damage and clean the connector. 2001 VLX 600 Reply Save Like T tcanthonyii · #8 · Apr 25, 2012 jimnfor said:.