Please consider an ANNUAL donation to help keep this site operating. They still would not come on. I posted a video and from the comments I learned that some of us have been unknowingly living with a defect. To start viewing messages, select the … PSA. No they are not supposed to run all the time. No, your engine cooling fans are not supposed to run all the time. Next step is taking it in and having it hooked up. 71 Posts . I checked all the connections. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. An electric fan does not have to work all the time. They also don't need to run 100% all the time because I have beefy eVGA mITX CPU cooler on a 4770 Haswell with no plans to overclock. Printable View. An electric fan SHOULD NOT run all the time. Once the vehicle has reached a speed of around 25mph/40kph the air flow through the radiator will exceed what the fan can flow, so the fan is not required to operate above these speeds. Our virtual experts can diagnose your issue (for free!) Are radiator fans supposed to run all the time? The fan lowers the coolant temperature after the coolant has finished its cycle through the engine. well, A: Yeah. This started about 2 days ago. 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. An electric fan shouldn't be on all the time. There are three. Let's Get It Fixed! Be aware the fan will not usually come on if the radiator is plugged, which … I notice that they do not run at idle, but after driving I stopped and ran out quickly to check and they were moving. They usually kick on within 10-15 seconds of turning the AC on and run about 90% of the time I'm driving. The fan, relay, and sensor are all known culprits so you will have to check the parts to find out what is going on. I assume its because it doesn't spin up unless its needed based on temp. Radiator Fan's Run All The Time My son's 2001 Pontiac Grand Am has constantly running cooling fans, even in this cold area of Michigan. 2013 f150 ecoboost and am having the same issue. 06-25-2014, 11:59 PM. ... Is it possible for me to wire the radiator fan into the motherboard and have them only run when necessary, or are radiator fans always going to run at 100% wired into the power supply? On a norcold 2118 is the fridge fan supposed to run all the time? I then replaced the three fan relays. The thermostat operates the ac in probably 30 second on off cycles. Hello, welcome to ASUS Republic of Gamers Official Forum. The second fan is for the A/C. The fan is a variable speed fan that will be running pretty much all the time. A low speed, a Series/Parrallel, and a high speed.. relays 28, 29, & 30 respectively. Brand new G750JZ - Are the fans supposed to run all the time? A mechanical fan will return until the engine is in operation, but only locks if necessary. Please note you may have to register before you can post: click the register link above to proceed. Also keeping your condenser clean reduces bug restriction, yes we have bugs up here. Sometimes the fans run on high continuously and sometimes they don't. It is only the two fans (radiator and condensor fans) that would stop running suddenly. Until recently the fans on the radiator were not spinning, i could set them to max in AI suite and they would come on however during gaming they wouldnt move at all. In this way, are radiator fans supposed to run all the time? I can't put a trigger on why the fans are on sometimes all the time. I had fan run all the time problem but mine was A/C pressure switch located on the A/C Drier.When I taped on it the fans would shut off.But I didn't have temp gauge problem. So, if the car was idling for a long time, both fans may kick on and there are other conditions which would explain it as well. Also, I just had my water pump replaced, afterward the low coolant light came on, I filled the radiator … However, if the AC is switched on they will always be running. Now about the fan. You will find, a vehicle with 1 fan, will probably run all the time with the ac on, even from a cold start up. Finally, my power supply fan is not spinning at all. So i just got my first car (Golf 2 CL 1987) and i just noticed that the radiator fan is not running even after i took at 10 min drive and the coolant hose/ radiator was pretty hot to tuch. Both radiator and condenser fans do not run when the You may have to register before you can post: click the register link above to proceed. It sounds like a freaking jet. The other is controlled by a temperature sensor which operates a relay. They run great and the engine is running at normal temperature. ... And the two radiator fans were: 1) off 2) one on, one off 3) both on, blasting away, but not getting the temperature down! My Corrado's radiator fans run ALL the time, including a long time after the car has been shut off and the key removed. The RennTech.org community is Member supported! Let's Get It Fixed! Both the radiator fan and condenser fan do not run at low speed when the engine coolant temperature is above 199°F (93°C), but both fans run with A/C ON and when the engine coolant temperature is above 210°F (99°C) Radiator and condenser fan circuit troubleshooting B (see page 10-23). This I can jump and get the fans to run slow, but not fast. All, Recently, the cooling fans in my 2017 Sierra 1500 run all the time. Fan operation normal. The radiator and A/C condenser fans are triggered by high coolant temperature or when the A/C is turned on. You do need a new fan before it rubs a hole in the radiator. Its very loud and the truck never warms up 100% if I'm sitting in it while idling with the heat on. cpeumr. Discussion Starter • #1 • Feb 26, 2011. Should the radiator fans on 2003 S run all of the time? The cooling fans were not coming on. This is why it would be stopping and starting. Most cooling fans use electric motors that have a moderate to high current draw, and as a result are commonly controlled using relays. Both fan blasting away. 3 Answers. The fans are supposed to come on in response to the heat of the engine. Quote; Post by EdBwoy » Sat Feb 02, 2019 6:04 am . Check to see if you have a relay sticking closed. As long as the engine is running, a mechanical fan will spin as long as needed. The fans are supposed to come on in response to the heat of the engine. Brand new G750JZ - Are the fans supposed to run all the time? Do radiator fans run all the time? When the fans are not running, and the car is allowed to heat up, the fans turn on low and off the way they should. sensor could also be defective telling the computer that he engine is too hot all the time. On the highway with that large radiator and a good 55-70 wind, sufficient enough for radiator cooling with the fans. 3 wire switch mounted about half way down the radiator. The compressor is running ALL the time. Radiator Fans running 100% all the time. All cars run hotter with the ac on. A Toyota's coolant temperature is regulated by many electrical and mechanical components. It should come on only when the A/C is on. Are … The only way to get the fans to shut down is to either 1) turn the AC off completely or 2) turn the truck off. Still no luck so I straight wired them so they would have power when the ignition was on. To avoid a … It ramps up and down in speed depending on load, A/C system pressure and engine temperature. Our virtual experts can diagnose your issue (for free!) Possibly a stuck relay. They never used to act this way. The cooling fan relay is the relay that controls the engine’s cooling fans. I believe this is draining my battery, so I'm gonna wire them up so they only stay on when the key is in the acc position or car started. Are the cooling fans supposed to run all the time or just intermittenly? This is supposed to happen when the ECM, which monitors the engine temperature, signals the fan motor to run. They start when the truck is started and never shut off and appear to be on at least 50 %, if not more. Similarly, why does my radiator fan turn on and off? It is electrical and driven by the ECM(computer module), which turns it on through a couple of relays. As soon as the engine starts the fans come on and stay on until it is shut off. Sorry if this is a stupid question, and thanks in advance for any help. The (ECT) engine coolant temp. Because right now, the Hadron fans are running 100% all the time and they are LOUD. It seems to me, if the radiator thermo switch was stuck in "very hot," I should still be able to unplug the harness for it, and jump the pins to get both to run on high. the two radiator cooling fans are turning on at all different times even when engine isnt up to normal operating temp. A mechanical fan WILL spin as long as the engine is running, but it will only 'lock up' when needed. Nothing happens on fast. Radiator fans run on high anytime the AC is on. and resolve simple problems. So, when warm, are both fans supposed to run at the same time? I place the old sensor back in fans still run the gauge would go and drop directly in the middle as it's supposed to. Share far and wide. and B: we have to figure out why the fans run all the time. Brand new G750JZ - Are the fans supposed to run all the time? Hi everyone, Its running is regulated by the Fan Control Module. Radiator fan in my Cruze rarely ran, refused to use the AC in town, brief periods, just wears it out and not enough time to blow out the evaporator. Is the radiator fan supposed to not run all the time? and resolve simple problems. Some cars have 2 fans . If this is your first visit, be sure to check out the FAQ by clicking the link above. What seems to happen is that the ECM is running the fan at all times, no matter the temperature of the engine. 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 runs all the time - Answered by a verified Chrysler Mechanic ... A radiator fan has always continued to run for a short wh ... i have a 2007 chrysler town and country with a 3.4 liter engine. One of the more important components is the cooling fan. 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