... No they are not supposed to run all the time. Diesels warm slowly. One of these fans will run continuously when the A/C is on. The compressor is running ALL the time. The trigger is the thermostat in the radiator of your vehicle. I'm curious as to why, only sometimes, after I've turned the engine off, locked the car that there is fan still running. A failed sensor can cause the fan to run excessively or not run when cooling is needed. MB Gigabyte GA-965P-DS3 VGA MSI NX8600GTS-T2D256E-OC CPU Intel C2D E6420 2.13 Ghz 775 … If there’s an issue with the relay, the fan will be affected. I've pulled the coolant temp. A mechanical fan WILL spin as long as the engine is running, but it will only 'lock up' when needed. C before sutting it off today. Fan turns roughly or does not turn at all. Ordered part on Amazon pointed out by Midnight earlier in the string of posts. It may cause the fan to cut in and out, or not come on at all. It is what sends the signal for the fan. Occasionally when working the truck hard at freewayspeeds the fan will engage but again that is only when the engine starts to get over normal operating temp. 2002 Dream CRUISER automatic just replaced fan motor now it run all the time. Took about 1/2 hour. Possible Reduced Fan Motor Life. I have never actually seen it work and was wondering if maby it only comes on when the engine reaches a certain temperature and it needs extra cooling... plus i also noticed a little radiator in behind the fan and was wondering if there is supose to be any fluid in it or not? Some cars have 2 fans . Faulty wiring could be to blame. 1. Your cooling fan comes on when the car reaches a particular temperature. The fans are not increasing your time to warm the engine. Should a radiator fan run all the time? Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. That depends on the car. I allowed the car to run today from cold to just above 80 deg. 0 0. I have a 2011 CR-V. They usually kick on within 10-15 seconds of turning the AC on and run about 90% of the time I'm driving. I put together a new pc and noticed the cpu cooling fan doesn’t run much at all. The thermostat operates the ac in probably 30 second on off cycles. As soon as the engine starts the fans come on and stay on until it is shut off. As mentioned it's not all the time and in the 8 weeks I've owned the car it's only happened a handful of times. An Inefficient Fan Can Be Costly To Run. My son's 2001 Pontiac Grand Am has constantly running cooling fans, even in this cold area of Michigan. The Toyota's fan only turns on when the coolant reaches a certain temperature, which is measured by a sensor. The dealer says they are not. But you also said that the radiator fan works at temp > half hence I think all is ok. sensor wires and it still ran. Your radiator fan should only run when your truck is at an idle/slow driving around town, and starts to get over normal operating temp. THIS IS THE RADIATOR FAN THAT RUNS UNTILL THE ENGINE IS COOLED DOWN. The thermostat keeps the coolant from going to the radiator. Thanks again!! 1 decade ago. Can any expert advice if the radiator fans should run all the time on the S320? No more fans running all the time. ... if the radiator is running, the fan is running. This is why it would be stopping and starting. Fan blade tip moves more than 1/4-inch front to back. Our virtual experts can diagnose your issue (for free!) 2. Similarly, why does my radiator fan turn on and off? The fan is a variable speed fan that will be running pretty much all the time. 0 1. The fan is retail with the CPU. Only way to stopit was to pull the fan … These fan systems were designed to run all the time and, assuming your system is properly installed with the correct size ductwork, it may even extend the life of the fan. Absolutely normal. All cars run hotter with the ac on. Hi folks, I'm new to the forum, so I'm still learning how all this works. If your home’s fan motor is an older inefficient “PSC” model, it could be costly on your electric bills to run it constantly. - 2002 Chrysler PT Cruiser The other fan should only run when needed to cool the engine down. When one feels the upper radiator hose (driver side), it is HOT, and the air blowing near that side of the radiator … Even if you have hundreds or thousands of programs running on the Task Manager details tab, your CPU should be at 1% or less most of the time (unless you're actually playing a game or processing information, the computer should be nearly idle most of the time). Our virtual experts can diagnose your issue (for free!) This is a 92 Geo(Corolla) with a 1.6L manual tranny. My 2000 T&C radiator fan keeps running after only a few minutes on the road. It is only the two fans (radiator and condensor fans) that would stop running suddenly. Junior. This is supposed to happen when the ECM, which monitors the engine temperature, signals the fan motor to run. While keeping your fan on 24/7 may be more energy efficient, there are a few downsides to leaving your fan on all of the time: Cons to Keeping Fan Continuously Running: It could cost you hundreds of dollars a year. An electric fan should not work all the time. I have a 1986 trx 350 4x4 and i was just wondering if the cooling fan should be working when ever the quad is running? Radiator fan runs all the time when engine running 2 Answers. Is this normal? The fan relay controls the power to the cooling fan. The fan continues to run at its maxiumum speed, regardless of the engine temperature. Any advice what is the normal operations and where can I can the circuit describtion on the fan controls. When the AC is on, the radiator cooling fan seems to run nearly all the time, at least when the vehicle is not moving. Its running is regulated by the Fan Control Module. Generally, newer cars cycle. Most cooling fans use electric motors that have a moderate to high current draw, and as a result are commonly controlled using relays. An electric fan SHOULD NOT run all the time. Cools off when i … radiator fan does not turn off, runs all the time. The most stressful part of any motor’s life is that when it starts. Leaking fluid or oily build up around the bearing or thermal spring. mechBgon Super Moderator
Elite Member. Radiator fans run on high anytime the AC is on. However, if the AC is switched on they will always be running. Excessive fan noise at all speeds due to failed bearing. A mechanical fan will turn while the engine is running, but will only be locked when necessary. It is much easier on the motor to run constantly than to start and stop all the time. I know it started about 6 months ago and that I get 2 miles per gallon less now. Small cars typically have stacked AC and engine radiators cooled by a single fan. I do not see any problems , the battery will not run out as at the max it should be 25 - 30 amps which is ok. check this working with a similar car to be 100%. Just completed replacement of Radiator Fan Control Module. Fan speed does not increase until engine is excessively hot. You will find, a vehicle with 1 fan, will probably run all the time with the ac on, even from a cold start up. If the heat, defrost selector is in any position it happens as long as the fan control in not on off. ... My 2013 F150 just started with the same problem, cooling fan running all the time, temp gauge follows trotle and cabun heater does not work. I caught the moment when the fans stopped running and did a continutity test on the dual-function pressure switch and see continutity on both connections - meaning the pressure is within range. Let's Get It Fixed! Even CPU usage over 4-5%, if sustained, will create enough heat to require active cooling. Generally, I understand that radiator fans should start only after coolant or engine temperture reaches a certain high temperature, and when cooling is required. In cool weather the fan may turn off for several seconds before coming back on. What seems to happen is that the ECM is running the fan at all times, no matter the temperature of the engine. And if it was shorted out the fan would run even with the key off because the rad fan relay always has 12v at all times According to the service book, low coolant levels and a potentially bad A/C pressure transducer will cause the fan to run flatout My independent mechanic says my radiator fan and AC fan are cycling too much. Sometimes it'll run for a few minutes and others times it's been still going 5 … Going nuts trying to fix this, radiator fan comes on when ignition is turned on. Can the CPU be running that cool? There are a few ways to DIY the repair yourself, but the first order of business is to find out what's causing the problem. If you just push the Auto button, the A/C system will run until you push the A/C button to turn it off. Radiator Fan's Run All The Time. Some cars run all the time, some cycle. An electric fan should not work all the time. Fan control works great. Seems like now that the A/C has lost enough pressure to not turn itself on upon request, the radiator fans do not run at all unless I short the Low Pressure switch on the sight glass and the car gets real close to red line temps in traffic. To avoid a further rise of temperature, the fan … and resolve simple problems. and cruise the internet. Does a radiator fan run all the time? dev. Vibration that increases with engine speed. The cooling fan relay is the relay that controls the engine’s cooling fans. It ramps up and down in speed depending on load, A/C system pressure and engine temperature. The A/C is not on. Now about the fan. T-stat is operating like it should as the engine temp.stays right in the middle. ANYTIME the AC is on, both fans should be on. This sensor switches the cooling fan off and on as needed. Let's Get It Fixed! If your refrigerator is on all the time, the cause could be a leaky gasket or dirt on the condenser coils or the compressor, thermostat or fan. Defective fan relay. I see from your comments and from the Antec site -that was linked- that the back one only runs at a certain temp. It is either that or your fan clutch itself. Thanks everbody, after further inspection, the fan on the front fo the PSU is running all the time; it's the fan on the back that freaked me out. A wiring issue. I run games (C&C3 and Supreme Com.) It is also overheating a little from time to time. In 25 degree weather it would take 12 miles to open the thermostat on mine, on a stop and go country drive of 55 mph or less. and resolve simple problems. It is electrical and driven by the ECM(computer module), which turns it on through a couple of relays. In this way, are radiator fans supposed to run all the time? The fans run for 5 seconds and then are off for 20 seconds. By fans, I assume it has more than one. A mechanical fan will turn while the engine is running, but will only be locked when necessary. 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