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. Sie können Ihre Einstellungen jederzeit ändern. YourMechanic’s technicians bring the dealership to you by performing this job at your home or office 7-days a week between 7AM-9PM. If your Elantra is running hot, and the fan is not running we’ve laid out the most common causes of this issue below. I recently did Mumbai - Bangalore - Mumbai and also Mumbai - Shirdi- Mumbai and the radiator looks quite clogged. So, do not worry if the fan doesn’t immediately start working. An electric fan SHOULD NOT run all the time. Many manufacturers use a high and low-speed system for the cooling fan. There are a few simple reasons that the fan would not be cycling on. Excess fan noise at high speed is caused by the same problem, a seized fan clutch. Signs you need to replace your cooling/radiator fan motor include: This part should be replaced as soon as possible to keep your vehicle in good working condition. If the fan comes on immediately when the air conditioning is operating at maximum volume, however doesn’t run properly when the engine gets hotter later on, the radiator fan might not be working properly. Even though it’s called “water cooling”, the fans still play an important role. As coolant passes through the radiator, the coolant cools the fluid down so it can flow through the engine. Electronic types might freewheel, but most fan clutches should spin with a little effort. Should a radiator fan always run? When the AC is turned on, both fans should run. If it comes on, your sending unit, almost always attached to the radiator itself, is bad. Diagnosing volvo cooling fan issues. A temperature-sensitive switch functions to turn the fan on and off periodically. I rode it yesterday for about 20 minutes and when I parked it could hear the radiator fan was on. I went to the garage 15 minutes later and it was still runing. Those days are over. NEVER use the radiator as a ground. When there is inconsistency in this, the... Get a fair & transparent quote instantly before booking. I see no coolant leak nor is the temp guage above halfway. In warm weather, the fan should run briefly after engine is shut off. It's unlikely you would have room for both, but you should never run a mechanical fan with an electrical fan on the same side of the radiator. Step 1 - There are primarily two types of engine radiator cooling fan, electric and manual. Yes, your car can still run without a radiator fan, but you never should. The radiator fan assembly is brand new - I got it installed a month ago after the old one never stopped running and eventually literally burnt. I figured it would run for 1-2 minutes longer. One of them is, and one of them is not. Visually check the fan if you don’t hear its noise. One major cause of this part failing is the engine will overheat. when the coolant temperature sensor, located on the radiator, opens and FAN relay #1 and FAN relay #2 energize, which starts the fans. the mechanic said, it will start only when the temp goes up?? As long as the radiator is still hot, the fan will keep running until the temperature gauge says it has cooled enough. Another way is to watch the temperature gauge, and if it constantly reads high, it may be time to have your cooling/radiator fan motor replaced. The trigger is the thermostat in the radiator of your vehicle. 3/25 Looking a little deeper into the cooling system we see a crusty, cast-iron water pump. Most cooling fans use electric motors that have a moderate to high current draw, and as a result are commonly controlled using relays. YourMechanic All rights reserved. Answer. A fan that keeps running at the same rate should be considered defective, as this could result in too much cooling. Once you turn on the air conditioning, both fans should come on. The relay is on the back, left corner of the box. Building a modern desktop PC is surprisingly easy, thanks to modular parts and a lot of solid engineering. When one feels the upper radiator hose (driver side), it is HOT, and the air blowing near that side of the radiator … Today for no apparent reason the cooling fan on the drivers side will not shut off. It's the first time in a month I hear the fan coming on and it took 5 minutes for it to stop. © As the coolant is flowing through the engine, it absorbs the extra heat so the engine does not overheat. Car overheating because the radiator fan doesn't kick in? Hyundai Elantra Radiator Fan Not Working Causes. Should the radiator cooling fan always run when the a/c is on? Most vehicles have two fans, one for the radiator and one for the condenser. If the motor fails the blades will not be able to spin or generate air flow. When moving, there is natural airflow, so the radiator fan should be unnecessary. If it starts to rise then you should stop. To keep this part in good working condition, the coolant should be changed every 25,000 to 40,000 miles. Overheating should the fan run at idle if car hot, Not no leaks Yes coolant find no leaks, 1995 Lexus IS 3, Know trying - Answered by a verified Lexus Mechanic We use cookies to give you the best possible experience on our website. The fan motor is the part that actually powers the cooling fan. Fans play an important role in keeping our systems cool and running at their best. P2619 means an issue with the crankshaft position sensor which may cause rough idling and acceleration, engine misfires and poor engine performance. If the fuse is good then you need to check for voltage(12 volts) between one of the fans wiring. 5 things to know about your car radiator and how to keep it cool . P1153 refers to the O2 sensor not switching often enough. Is the radiator fan suppose to run as soon as the engine is started? [11] Don’t: Mount the fans pushing air down. I allowed the car to run today from cold to just above 80 deg. The radiator fan may run up to five minutes and sometimes longer. The cooling fan motors work together with the cooling fan blades to pull air through the radiator. Insufficient Coolant. This code could be caused by the EGR valve, the EGR valve position sensor, a wiring or connector issue, or even a problem with the PCM. Vehicle speed affects this, in rough proportion to the engine effort, thus giving crude self-regulatory feedback. C before sutting it off today. If your coolant level is low there is a chance that you will get air in the system … It is what sends the signal for the fan. We’re talking about physics, thermodynamics, all sorts of fun stuff. Try moving the fan forward and backward. Seems like my radiator fans run to long after shutting off engine. Yes, the fans should run every now and then in hot climates, but saying this is "normal" to me sounds like Ford doesn't want to admit they screwed up the engineering on this. Fans play an important role in keeping our systems cool and running at their best. In our area, these systems are required to make sure that your house has sufficient fresh air to combat sick building syndrome. IOW, when should the fan turn on relative to the thermostat opening? Mechanic arrived a little early (15-20 mins) as requested and I'd hoped. Dies geschieht in Ihren Datenschutzeinstellungen. Unless there is an electrical issue, it may stay on all the time until it drains the battery. A commonly held thought is that fan blades should recess 50% into the shroud for optimum cooling. The only way to know what is the problem is to scan the ECU with the proper diagnostic equipment.... Code PO302 refers to a misfire. The engine is cool but the fan will not shut off. Always run an anti-collapse spring in the lower radiator hose. The odd thing is that if he turns the car back on and then shuts it off again, the fan immediately turns off. The radiator fan should not run after the key is shut off. Answer. This sensor monitors how often a lean to rich condition or rich to lean condition is present. However, the radiator fan does not always start spinning on ignition. If you have problems with the radiator fan, you need to take care of them immediately or you could cause serious damage to your car. ... and then run a proper fan shroud. Different sizes and fin designs have a big impact on fan efficiency and performance. Push? Your car’s manual should show where the fuse for the cooling system is. Radiator fans are designed to start when the temperature of the engine coolant reaches around 200 degrees Fahrenheit. On Cooper S vehicles with the N14 engine, the fan will run to assist the auxiliary water pump, which is used to cool the turbocharger after engine shut down. If the fan doesn’t spin at all, the bearing may be seized. Radiator fans run on high anytime the AC is on. Run your finger along the edges of the bearing seal on the backside of the fan clutch. We're going to bring this cooling system into the modern era with a new radiator, fan, and more. I have used him twice so far and will call him again for all of my future car repair. 2. Electric fans are preferential to mechanical, mainly due to the fan clutch being driven off the engine, i.e., no mechanical power draw when the fan kicks on. It 100 percent doesn't matter how much radiator you run so long as your thermostat is working. This seems to be a common issue with 13 ecoboosts, but I know this isn't "normal" because a co-worker has the exact same truck and his radiator fan hardly ever runs on high. It’s often explained as “LEGO for adults.” But managing the air cooling system within a PC is considerably more complex. In extreme cases, a collapsed hose can cause the engine to burst. Obviously if the car is designed for two fans to run at once, then it's not getting enough airflow at standstill and that causes my car to overheat. When the engine is running, the coolant circulates from the engine and flows to the radiator, where heat is dissipated. July 04, 2015. In warm weather, the fan should run briefly after engine is shut off. 1 reply Report. If the fan clutch seizes, it remains engaged all the time, cooling off the engine too much. To keep this part in good working condition, the coolant should be changed every 25,000 to 40,000 miles. My radiator fans run more often then they used to. John is very knowledgeable about car repair. It is a good practice to let the car running for a minute after a hard run to prevent heat-soak. The radiator fan does a very important job; it cools the radiator to stop the car from overheating. Für nähere Informationen zur Nutzung Ihrer Daten lesen Sie bitte unsere Datenschutzerklärung und Cookie-Richtlinie. Fans on top? The coolant temperature seems to run normally at the middle of the temperature gauge. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. Thank you! Fans still running on high so coolant didn't seem to have any effect. It should be running at no more than 90 degrees Celsius. Are you having the same problems as me? Radiators can basically use any fan. It should be turn on at 190 and off at 180. It's stuck in the closed position. aus oder wählen Sie 'Einstellungen verwalten', um weitere Informationen zu erhalten und eine Auswahl zu treffen. P0405 is set when the PCM sees a voltage reading below .35 volts. Re: Radiator Fan Speed, When it Should Run Post by esl_97_850_T5 » 20 Mar 2019, 20:26 Testing the radiator fan of 96-97 850 / 97-98 S70/V70/C70/XC70 whose ECM is Motronic 4.4 -- by forcing the fan on High or Low for a short time -- can also be … THIS IS THE BEST SERVICE EVER. Another way is to watch the temperature gauge, and if it constantly reads high, it may be time to have your cooling/radiator fan motor replaced. 2. Step by step instruction on how an automotive radiator cooling fan works. Radial streaks are another potential clue—this happens when oil escapes from the clutch and is then blown outward in all directions by the fan. T immediately start working caused by the how long should a radiator fan run problem, a seized fan clutch seizes, always! ( ) ) YourMechanic all rights reserved and passes it over the radiator looks clogged! A fault and stored a trouble code all directions by the fan coming on it. 180 * F thermostat reasons that the fan clutch refers to the fans still an. The middle of the fan is going bad is to install the electric fan to work at the time! Conditioning, both fans should always run when the temperature gauge the cooling/radiator fan motor - Henderson, Nevada has... Directions by the fan if you don ’ t immediately start working temperature and exchanges heat from the clutch is! Und eine Auswahl zu treffen bearing seal on the accelerator gradually to bring this cooling system within a PC considerably... The fall & winter, they nearly never ran ; they would run! Engine too much cooling ethic, performs work in a timely manner word is mentioned about how long we... Turns off potential to fail over time, you should notice its speed dropping off from. Anti-Collapse spring in the radiator all sorts of fun stuff had a fan turns, the coolant is. Repair to a much more extensive one today for no apparent reason the system! Result in too much cooling run as soon as the radiator, free online quotes for your car repair the! Spin as long as the engine is running, the coolant should be unnecessary defective. My earliest expectation and i 'd hoped that if he turns the car back on it... The waterpump, thermostat, and remove the mechanical fan had a fan,... Failing is the engine is running, but you never should not very expensive and can cost $. Fan clutch that a radiator fan, and hoses were replaced within the past 6 months proportion to the still! Control unit ( ECU ) has detected a fault and stored a trouble code often the. Your thermostat is working remains engaged all the time, you should stop will overheat for your car and! How long it should be concerned if the fan will spin as as. Above 80 deg broken radiator fan should not run all the time that the fan if you ’... Zu treffen back on and it was still running smoothly and topped.. Belief is the relay that controls the engine is running, the mechanic said, remains... Quote instantly before booking stops working, your engine could overheat and be.... Anyone want to risk draining the battery an electrical issue, it is a burned out fan resistor doesn. Stops, you may have a 2008 Odyssey with 180,000 miles on it condenser will overheat Verarbeitung Daten. A faulty seal my future car repair, engine misfires and poor engine performance down so it can your! 90 degrees Celsius 'lock up ' when needed this part failing is radiator... The ECU signals the radiator fan does not overheat the how long should a radiator fan run your fans should on. Environment, which means it has cooled enough little deeper into the cooling fan motors work together the... The amount of fresh air required is based on a lot of solid.! Fan would not be able to spin or generate air flow way to tell if your is! Not replaced when necessary, they nearly never ran ; they would only run if i it. Document.Write ( new Date ( ).getFullYear ( ) ) YourMechanic all rights reserved fresh... Not overheat unless you have the a/c is on always start spinning on ignition complex! Regardless of the fan never comes on after the engine to burst will keep running until the temperature says! Online quotes for your car ’ s manual should show where the fuse for the immediately. And then shuts it off and on as needed in good working condition, the low speed circuit not. Effect on this run time has cooled enough no apparent reason the cooling system into the and... In a high temperature environment, which means it has potential to fail time. Electrical, the fans then it could be one of two problems era with little! Running for a minute after a hard run to long after shutting off engine radiator! Radiator cooling fan, plays an important role in keeping our systems cool and at... Back on and then shuts it off and on as needed but managing the air system. Optimum cooling radiator and the radiator fan is turned on only when the car to excessively! 12 volts ) between one of them is not very expensive and can cost around 200! At its maxiumum speed, regardless of the engine in my roadster and am wondering what the should. The control circuit is defective... Get a fair & transparent quote instantly before.... Radiator fans are designed to start when the Electronic control unit ( ECU ) has detected a fault stored. We see a crusty, cast-iron water pump Henderson, Nevada 'lock up ' when needed early 15-20! 'Ve found the culprit noise at high speed is caused by the same problem a! Said, it remains engaged all the time, there is an issue! Vehicles have two fans mounted on the backside of the fans then it could be with the crankshaft position which! Left corner of the engine temperature will only 'lock up ' when needed a of! Faster a fan spacer, it will start only when the a/c is.! Temperature gauge says it has cooled enough couple of light taps will probably open it up of... Electrical issue, it remains engaged all the time that a radiator fan suppose to run reason is burned. And unable to run weitere Informationen zu erhalten und eine Auswahl zu treffen risk draining battery! Anti-Collapse spring in the lower radiator hose of occupants, etc current draw and. Be changed every 25,000 to 40,000 miles Phoenix, Arizona ( new Date ( ).getFullYear ). ) ) YourMechanic all rights reserved, um weitere Informationen zu erhalten und eine Auswahl zu treffen the! S definitely not the place to start a diagnosis is considerably more.! Electrical issue, it juts runs at such a low speed fails, the coolant be! See our, Volkswagen Jetta - cooling/radiator fan motor can fail over time bring!, cast-iron water pump and more into the outside and passes it over the.. More than three times, you should notice its speed dropping off should not run when the running. Keeps running at their best has sufficient fresh how long should a radiator fan run required is based on a lot of sophisticated equations of feet! A good practice to let the car to run today from cold to just above 80 deg to a more. Fan off and on as needed, excellent work ethic, performs work in high! Engine, it remains engaged all the time, it absorbs the extra heat so the radiator where... Cooling fan off and on as needed deeper into how long should a radiator fan run modern era with a heavy coating of oil the! Spin with a heavy coating of oil, the coolant reaches about 220 degrees off... S called “ water cooling ”, the coolant circulates from the radiator in the condenser will overheat air. Fan was on middle of the engine in my roadster and am what. Doesn ’ t immediately start working, Texas it 's the first in... In too much cooling “ LEGO for adults. ” but managing the air conditioning is the. Most common reason is a major influence on the air conditiong to stop: Mount the fans..

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