It was the Cooling Fan Module. Most newer cars have a different style of fuse that uses a plastic housing; with the fusible link encased in the housing. Engine cooling fan not working. Unplug the wiring connector on the fan, and use the jumper wires to route power directly to the fan. If you spin the fan manually, when it is cold, it should have less friction than when hot. If I disconnect the temperature sensor, both fans come on immediately. Author. The problem of the radiator fan not working will cause tremendous damage to the engine and thus must receive immediate attention when it arises. If you do have low coolant, don’t fill it up until the engine has cooled off. We do not intend to infringe any legitimate intellectual right, artistic rights or copyright. The fan is controlled by a viscous clutch that varies the torque according to the temperature. 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. Post I replaced the engine cooling fan motor..still not working I replaced the coolant temp. Finally, Keep fingers and tools away from the fan blades. DO this easy check First!If your Honda Fans aren't working it can be easy repair. Member. We use cookies to give you the best possible experience on our website. If you find that your Volvo’s A/C system does not come on even when the parts under your hood become too hot, the cooling fan module may not be working at all, meaning it’s definitely time to find a replacement. Jun 3, 2020 #1. If the fan motor is good, the fan should spin at normal speed when supplied with 12 volts. They do not start when the engine is warm... this is the problem. Not sure what engine you have so this is for a 2.2 - Engine coolant fan should come on at low speed when engine temperature is 223 degrees or A/C high side pressure is 190 PSI. 2004, chevy cavalier motor cooling fan stopped running. Jun 3, 2020 #1. The clutch assembly for your car’s cooling system is what keeps the radiator fan attached to the engine, ensuring it has the right amount of power to keep propelling. by 4V8s » Fri Jul 24, 2015 9:12 pm, #8 Engine Cooling Fans not working... Help! That’s why your AC is not cool. One of the first symptoms of a potential problem with the cooling fan resistor is engine overheating. - Answered by a verified Ford Mechanic. Still not coming on. replaced the fan and now my truck cools. The engine did not seem to be overheating however running smoothly and the coolant was not trying steam out of the expansion tank as it normally would when it overheats. The problem spreads to the rest of the cooling system, the engine, and the entire vehicle. Go ahead and read the steps described in Fuel Pump Relay – Function And Testing Procedures. So, this kind of […], Not operating within a “normal” temperature range of about 195 to 220 degrees F. will cause automotive engine overheating. Resident experts will be on hand to help you keep your car in tip top condition. Step by step instruction on how an automotive radiator cooling fan works. My son used the car for a while and he replaced the water pump, removed the thermostat and replced the hoses but he said it kept over heating. Switch the wires to the opposite terminals. Engine Cooling Fans Not Working. I have a 1995 Ford Mustang with a 3.8L engine. The easiest way to check it is; visually check it for a … Post Adding coolant to a radiator dry enough not to trigger the engine temp sensor can cause problems from drastic temperature change. Whether the engine is running or not. Member. However, the fans do work when I turn AC on. With my scanner hooked to the truck, the engine temperature will go up to 220F and fans will not come on. Consequently, if your electric cooling fan isn’t coming on; you can bet there’s something wrong with the fan assembly, the circuit, or one of its components. My fan would work when not driven and always come on with AC but after being driven on the road the fan would stop working even with the AC turned on. Check power and ground at the fan connector. If the fan does operate, the vehicle must be taken into a professional service center for testing on the PCM, which controls the cooling fan relays. The engine turns on fine and sounds amazing but I dont want to run it in this Hot Arizona weather so it can just over heat later and make it a bigger problem. Defective fan relay. Ive replaced the relay and the temp sensor. Hello, I have been researching an issue with my cooling fans on my 2005 Silverado on the forums, and hoping someone could assist me. Connect your test light to battery ground. But you need a scan tool that reads Body and Chassis modules - not the popular emissions-only OBDII reader as at Autozone, etc. The clutch may be defective. The quickest way to tell whether or not the electric fan(s) are working is to start the engine; let it reach normal operating temperature and then turn the A/C on. Jump to Latest Follow 1 - 12 of 12 Posts. How can I be certain it's bleed fully? The most common symptom of a faulty cooling fan motor are cooling fans that do not come on. Hey guys I havent posted in a while due to my frustration with my FIST, at 52,000 miles motor went south but good thing for warranty, coolint in number 3 cyl before the motor was done. If you notice that your engine is running at higher temperatures than normal, that may be a sign that the relay is not functioning properly. Also they work by completing the ground path to the engine computer input, which in turn will turn the fan on. Now suspecting faulty sensor to temp gauge. If the cooling fan motors burn out or fail, the cooling fans will be disabled. Message. Post Issues with the cooling system can also cause the engine to run cold. Working as part of the engine cooling system alongside coolant, a radiator fan blows cool air through the radiator as a means of heat transfer to prevent the engine from overheating. Post Coolest fans not working and it overheating once in awhile. Otherwise, the switch is not working. Let it cool down first. Cooling fans will not turn off: If the cooling fans are staying on all the time, this is another (less common) symptom. Most cars (GM for ex) the fan will not come on until the coolant gets to about 210° Farenheit. Thread starter stuartb; ... but was sort of pleased to find the radiator fan was not spinning but there was still the right amount of water in the expansion tank. Hi, I have a 1998 Caravan and the engine cooling fans wont go on. i need a coolant temp sensor too. If you find a blown fuse or tripped breaker, the fan motor might be pulling too much voltage. When it malfunctions or breaks down, it affects the fan. Like any other clutch, a fan clutch will wear out over time. The fan is controlled by a viscous clutch that varies the torque according to the temperature. switch. 2. If the cooling fan resistor fails or has any issues, it can cause power to be cut off from the cooling fans, which can lead to overheating. The fan relay controls the power to the cooling fan. Electric radiator-fan motors are switched on either by the ignition switch - and run while the engine is working - or by a thermostatic switch. Causes the A/C to disengage at low speed/idle (works fine at highway speed). The electric cooling fan uses a direct current (DC) electric motor with a thermo switch; module or computer control to turn it on or off. The engine cooling fan system consists of two electrical cooling fans and three fan relays. Timing Belts – Why Should You Replace Your Engine Timing Belt, Engine Spark Knock – That Annoying Knocking, Pinging Or Rattling Sound, Tailpipe Smoke – What Does The Color Of The Tailpipe Smoke Mean, Engine Coolant Leaks – How To Find Them – How Bad Are They, Valve Lifters – Hydraulic And Mechanical – What Is The Difference, Radiator Cap – Basic Function – Failure Symptoms – How Important Is It, Engine Bearing Replacement – Learn How To Replace Engine Bearings, Ignition Timing – Your Engine Knows Timing Is Everything, A wiring problem (blown fuse, loose or corroded connector, shorts, opens, etc.). sensor...still not working. Consequently, any problem with the electric cooling fan can stop it from, transferring heat away from the radiator. by RoverRevival » Sun Jul 19, 2015 10:44 am, #3 If You Think The Problem Is The Cooling Fan Relay, Test It ! I don't know about the fan relay No. If it’s not working, the fan won’t turn on when it needs to, which means the engine might overheat. So, What happens if the ignition system fires at the wrong time. 05-12-2008, 11:52 PM. Discussion Starter • #1 • 7 mo ago. 1. Why? Like any other clutch, a fan clutch will wear out over time. Car started overheating about a month ago. Jun 3, 2020 #1. 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. Post In the city or heavy traffic the gauge will go to the first tick mark past 12:00 and the fans come on. The most recently reported issues are listed below. When I got it back I noticed the cooling fan was not coming on. Haven't had a chance to jump the fans, but I'm assuming since both fans aren't turning on that it's electrical and not the motors. Re: 99 seville.. cooling fan not working Fans run in SLOW at 224 degrees F, FAST at 236 degrees F if there is no air conditioning or DEFROST function set. Another early indicator of a problem with your cooling system may be the check engine light on your dashboard. I found out that the 2 radiator fan do not work after engine start although it mention something like "Fan start automatically after engine start" on the fan. If everything else seems on the up and up, the springs in the fan clutch … Which means it should start coming on; after the engine reaches full operating temperature. This lead me to suspect the fans, so I tested the fans themselves (independent dual electric cooling fans). Probably be a good idea to shut off the engine first. The electric fans still work in the Buick when AC is turned on, but the problem still remains on the truck fans. Probably be a good idea to shut off the engine first. I wired each fan directly to the battery, both function correctly. I decided to remove the whole fan assembly and I connected jumper cables from the battery to each fan motor. One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. by RoverRevival » Sat Jul 25, 2015 1:44 pm, Having problems with your 200 or 400? My son used the car for a while and he replaced the water pump, removed the thermostat and replced the hoses but he said it kept over heating. If everything else seems on the up and up, the springs in the fan clutch … If you do have low coolant, don’t fill it up until the engine has cooled off. If your engine is overheating, or shows signs of running hotter than normal; you may have a problem with your electric cooling fan. Thread starter THE COOP; Start date Jun 3, 2020; T. THE COOP. the radiator alone is pretty expensive. Finally,  the computer or module uses this information, to activate the cooling fan through a fan relay(s). Post It is possible that a wire has worn out due to heat and needs replacement. Step 1 - There are primarily two types of engine radiator cooling fan, electric and manual. Start and idle the engine, and back probe the connector terminals with the test light. Hopefully this will fix the problem of the Cooling Fan not working. i got one from a junkyard - about 15 minutes to remove with the radiator and about $40 total cost. If the fan does not operate, continue troubleshooting. So, when coolant temperature changes, the thermo switch reports this change to the computer through a voltage signal. Try taking a direct feed from the fuse to the fans and keep them on perminently better than no fan , over heat , no engine. You can test the cooling fan temperature switch using a test light: The relay is a critical part of a cooling system. Engine cooling fan not working. Other cars the cut in range may be lower. Probably heat related as … I have a similar problem and cannot find my specifics after doing a lot of research and forum reading, so I hope someone here could help me. If your engine is overheating and you suspect problems with the electric cooling fan; we have some important troubleshooting tips. R. R383L_V ... the fans wont turn on!! omend out relay in fuse block in engine its good 30a fuse good,is there a tempeture sensor for fan, is the fan motor electronic, fan … Your test light should come on. Engine stalling is more likely to occur during cold weather or when starting a cold engine. 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 the fan is not working even when the car is heating up there might be a problem with the wiring. Messages 86 Likes 24 Location chapmansboro. Your Altima’s radiator fan will not kick on. Next, I checked the relays, both tested operational. Messages 86 Likes 24 Location chapmansboro. If you cannot find any other radiator fan problems, the clutch is most likely the cause. by r8gti » Sun Jul 19, 2015 11:43 am, #4 With the AC on and the radiator fans running the car will remain at 90 degrees and the engine coolant is not lost. If this clutch goes broke, the fan won’t work. Your engine cooling fan will not work if you have a blown fuse. So, A relatively constant operating temperature is absolutely essential for proper emissions control, good fuel economy […], If you are not having any fuel pump issues; the fuel pump should deliver fuel from the fuel tank to the engine; at the appropriate pressure. First, removed the top cooling fan relay and stick a paper clip or jumper between pins 3 and 5, and another between pins 7 and 8. The cooling fan motors work together with the cooling fan … I know i bought them prematurely but I work 10 to 10 for the next 4 days and i work at a shop where i have time in between to go outside and work on the car. One common reason for engine overheating, especially during the warmer months of the year, is a malfunctioning cooling fan. Since you omitted the model, year and engine size we cannot assist you with specific details on where these parts are etc. Engines; Accessories/Keys; My Cooling Fan Won't Stop Running on My Radiator by Don Bowman . The top two relays are the ones we are interested in. The ground path is provided at G101. This switch is configured to work based upon the temperature of the engine. COPYRIGHT © 2021 DANNYSENGINEPORTAL.COM BY DANNY BENDER - DISCLAIMER: All wallpapers and backgrounds found here are believed to be in the "public domain". 76 Posts . Did any cooling fan come ON? Check for a shorted wire or replace the fan motor. As the coolant lowers to 213 degrees F the fans turn off and the cycle repeats. regardless of coolant temperature. Also... temp sensor is mounted on the engine on the 1.6 variants. Post This article pertains to all vehicles. So, when checking for cooling fan problems, a modern vehicle may present a challenge. But, if the fan doesn’t work with direct battery power, check for any blown fuses or a tripping breaker. In that case, the temperature gauge will remain in the blue. If there’s an issue with the relay, the fan will be affected. The cooling fan on these trucks is not electrically controlled. Most of the images displayed are of unknown origin. It could be low on refrigerant or a bad relay, a sensor, an ambient temperature switch or the AC pressure transducer is bad. Had the AC system checked. on my vehicle - ML 55 - the cooling fan controller and fan are integrated. In newer vehicles with computerized engine controls, cooling fan operation is regulated, by the (PCM) or a fan control module. Older cars have glass; cylinder-shaped fuses with stainless steel on the ends and glass in the middle. A coolant fan switch is a small and very simple switch comprised of typically two wires. 2 and No. by r8gti » Sat Jul 25, 2015 12:08 pm, #9 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 have tried to swap the radiator fan relay to another Camry that has fan working ok but nothing change. Consequently, Most of the time power will fall […]. The fans will automatically shut OFF after 3 min. alydar66. The fan has a final stage resistor built in so it gets a pwm signal for activation and speed. I've put my Mini dashboard computer in to test mode and got it to display the water temperature on the display. The engine cooling fan does not come on and I have become lost on what the problem may be. on mine it was caused by a broken wire in the connection to the coolant sensor in the side of the radiator. A metal-oxide semiconductor may overheat due to insufficient screwing of the semiconductor on the … Thread starter THE COOP; Start date Jun 3, 2020; T. THE COOP. They do not start when the engine is warm... this is the problem. Cooling fans do not come on. Engine Antifreeze Coolant – What Does It Do ? The short was even affecting my transmission making it flare up as a fuse in the same area as the fan relays powered the transmission. Post mine needed replacing. Having problems with your 200 or 400? The cooling fan on these trucks is not electrically controlled. The one fan turned...the one that wasn't working still wouldn't work. If you spin the fan manually, when it is cold, it should have less friction than when hot. Cooling fan system not working completely. Post This morning before work I stopped at autozone and picked up a new relay, ect sensor, and temp. This is the place for asking advice and help on technical problems. If the cooling fan stops working, most do-it … So I'm assuming it's a bad fan motor. The steps are the same for your relay. Non-functional cooling fans are another common symptom of a potential problem with the cooling fan relay. Volkswagen Jetta owners have reported 16 problems related to cooling fan (under the engine and engine cooling category). What is my problem. Out in the desert with 2 old Jeeps and a Saab 9-3 cabrio. Electric cooling fans are used, to move air through the radiator, when the vehicle is not in motion. • After the vehicle is shut OFF if the engine coolant temperature at key-off is greater than 101°C (214°F) the low speed fans will run for a minimum of 60 seconds After 60 seconds, if the coolant temperature drops below 101°C (214°F) the fans will shut OFF. The computer turns the cooling fan on and off when it receives a temperature indication from the coolant temperature sensor. Let it cool down first. I know the fans turn on at a certain temperature and if the A/C is on. 3. If it doesn't spin, a code should have been recorded. Resident experts will be on hand to help you keep your car in tip top condition . Engine Cooling fan is not working at all on my 2004 Chevrolet Cavalier (not even with the A/C turned on). The relays are arranged in a series/parallel configuration that allows the PCM to operate both fans together at low or high speeds. by Johnny 216GSi » Thu Jul 23, 2015 11:59 am, #7 if engine at long stand still,the engine temperature will rise about 190 degrees the cooling fan suppose to automaticaly turn on when coolant temperature sensor get hot it cause its resistance decrease causing pcm to send power to coolant fan relays and cooling fans, when you turn on AC the cooling fans suppose to turn on to cool down AC CONDENSOR, IF NOT AC WONT WORK COOLING FAN … Fuse checked out ok so I replaced the fan module. If you short those wires together the fan should come on - check it that way. The clutch may be defective. Valeo is recalling certain engine cooling fans, part numbers 696121, 696273, and 696275, used as service replacement parts for model year 2008-2011 BMW 1-Series, 2006-2011 BMW 3-Series, 2000-2009 BMW 5-Series, 2004-2005 BMW 6-Series, and 2006-2007 BMW 7-Series vehicles. Cooling Fan Not Working #1 Post by r8gti » Sun Jul 19, 2015 … My cooling fan is not working properly while AC running and AC is not cool. Is it the same sensor that drives the dash display that is also used to switch on the fan? This didn't seem to resolve the issue -- the engine still overheats when at a stop. I wired the fans directly to the battery and they work. If you need to confirm if it’s in working order or not, you should turn on your engine and let your vehicle idle. (ECT) Engine Coolant Temperature Sensor – What Can Go Wrong, Engine Rattling Noise – Where Is It Coming From – How Bad Is It, Engine stalling problems can be hard to find and are often sensor or temperature related. When you changed the radiator, did you change the thermostatic switch on the radiator or re-use the old one? Your Kia Sportage‘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. – Why Do You Need It ? As engine … When the temperature exceeds a specific value -- usually 215 degrees Fahrenheit -- the computer will turn the fan on. Reply. So I checked the two cooling fan fuses and three relays and they were all good. Would that effect fan operation? The fan will usually store a fault in the dme for activation or ihka system faulted for excess pressure (because fan is not coming on). Consequently, A broken armature will rattle around the relay. My coolant temps were spiking to 230 deg and still the fan would not kick on unless I had the AC on. Your cooling fan operates through a series of circuits. This lead me to suspect the fans, so I tested the fans themselves (independent dual electric cooling fans). If it does spin but doesn't come on later when needed, you have ruled out the fan motor but not much else so far.