As engine temperature rises to a specific threshold, the switch is activated powering on the coolant fan. Turned my car off and the a/c fan kept running. Optimize fleet uptime and compliance via mobile vehicle repairs, Partner with us to simplify and scale fleet maintenance, Over 25,000 topics, from beginner tips to technical Radiator fan comes on when engine is cold. Problem is.. To check the temperature at which the fan comes on, turn the A/C off and keep the engine running until it reaches normal operating temperature. Made with ♥ in Silicon Valley. When the engine is cold, the thermostat is closed except for a small bypass flow so that the thermostat experiences changes to the coolant temperature as the engine warms up. GERT1.8 MEMBER; 2002 VOLKSWAGEN POLO; 4 CYL; 2WD; MANUAL; My VW Polo Classic 1.8 radiator fan comes on irregular. 752 Great Deals out of 38,093 listings starting at, 2,862 Great Deals out of 124,365 listings starting at, 290 Great Deals out of 14,257 listings starting at, 1,609 Great Deals out of 98,551 listings starting at, 118 Great Deals out of 3,179 listings starting at, 507 Great Deals out of 17,794 listings starting at, 846 Great Deals out of 34,948 listings starting at, 605 Great Deals out of 22,333 listings starting at, 459 Great Deals out of 18,585 listings starting at, 548 Great Deals out of 30,797 listings starting at, 136 Great Deals out of 7,152 listings starting at, 432 Great Deals out of 14,776 listings starting at, 587 Great Deals out of 27,053 listings starting at, 287 Great Deals out of 22,104 listings starting at, 1,250 Great Deals out of 65,372 listings starting at. The length of time cycling on and off seems to correlate to the temperature. Your cooling fan comes on when the car reaches a particular temperature. Then, the fan should come on. Fans only kick on when AC is ON. Please refer to CarGurus Terms of Use. If the fan does not come on, something in the control circuit is defective. The guy said it could be air bubble or trash in the radiator. But as contradictory as... Summer Summer is a great time for a road trip, but often travelers like bringing all the conveniences of home along, in the form of an RV. Waited for it to cool off then drove home with no problem at all. While we can not advise you to buy the car or not, you should do some... Hello. The computer that runs both sides of the automatic seat belts is located under the passenger side seat. Small cars typically have stacked AC and engine radiators cooled by a single fan. Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Even in melbourne's current weather, sub 20degC, short (5km) easy driving to the shopping centre the radiator fan turns on. Your cooling fan operates through a series of circuits. This cycles on and off for about a few minutes. 6 Posts . 2CEXPT … 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. Coolant levels are at max cold level. When the temperature exceeds a specific value -- usually 215 degrees Fahrenheit -- the computer will turn the fan … document.write(new Date().getFullYear()) Fan kicks on about 30 seconds after vehicle is started and is extremely loud. There is a fault code set in the engine computer that will cause it to operate in a failure mode in that it turns the fan on to be sure the engine will be cooled. If stuck closed, the result would be the engine overheating in a short time. temperature gage not reading? The fan is temperature-controlled to make sure that the engine … A bad knock sensor will not keep your car from starting. Engine Cooling. You’d think it’d have to either be zero-emissions or not in the category at all. 2015 Chevrolet Silverado 1500 LS Crew Cab RWD. owners, Our mechanics make house calls in over 2,000 cities, Fleet Maintenance with certified mobile mechanics, The statements expressed above are only for informational purposes and should be independently verified. The radiator fan comes on when the engine is cold, Unless there is an electrical issue, it may stay on all the time until it drains the battery. cooling fan stays on after engine is shut off? Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing. is it safe to drive the truck? I have a 2011 silverado. Thought the fan was supposed to kick on when it reached a certain temperature then goes off once the temp drops. If If it’s time for you to search for the top used cars specifically for families, check out the list we’ve put together of the top five. Visually check the fan if you don’t hear its noise. Turning AC off doesnt stop fans Only turning off the truck stops them. Ok. Another possibility is the window motor itself. Radiator fan comes on when engine is cold. A low coolant level can affect your air condition when the weather warms up; having a coolant concern corrected before summer can avoid possible air conditioner concerns. A radiator fan is not very expensive and can cost around $200 – $400. Gauge still stays on cold. The cooling fan should come on immediately or within the next couple of minutes. On older vehicle models, just wait about 15 to 20 minutes for the engine to reach operating temperature. you would need to look at wire schematic to be sure for my cooling fan stays on for several minutes after engine is shut off? My car has an automatic transmission. Asked by Wiki User. This issue doesn't happen if engine is warm. The cooling system thermostat is designed to quickly bring the engine up to operating temperature. So, do not worry if the fan doesn’t immediately start working. on, several weeks after the first time. check if a/c is on this would activate fans to cool condenser when Most of these radiator fans have a built-in clutch, allowing the fan to idle when the engine is cold, saving some energy and power for an efficient mechanism. Why radiator fan not work at the same times when engine running [ 4 Answers ] Cold radiator [ 0 Answers ] Not to sure if the TRV is on the Return instead of the Flow as flow pipe is cold, but the Return pipe is hot OR The Radiator and the flow pipe is cold as the TRV on the flow is broken A slow coolant leak may leave a trail of dried coolant, but the level may not be enough to cause overheating at the moment. If the coolant level is low this will affect the operating temperature of the engine and heater as well. My radiator fans are all out off whack (simply put). The list of must-haves Typical items that families are looking for in their... Top 10 PZEV Cars for Eco-Friendly Drivers, The Best Used Cars to Buy That Can Be Towed Behind an RV. Yes. Is the climate control set to defrost on the windshield? The computer turns the cooling fan on and off when it receives a temperature indication from the coolant temperature sensor. There are a few common issues on this vehicle. YourMechanic All rights reserved. Before getting too far into it, I always check to see if there is any aftermarket equipment such as an aftermarket radio. After sensing the heat temperature, the radiator fan turns on when the engine is running at a higher temperature. It only does this on cold mornings, and only for a mile or two. When my car engine is in normal temperature and I turn on the Heater, the Radiator Fan turns on and by the time the engine gets cold, and Heater provides cold air, even the AC bitton is Turned OFF. The radiator fan may run up to five minutes and sometimes longer. This winter thermostat kept sticking so I had it replaced with new thermostat. That depends on the car. If the engine's warm when you start it, then the fan might kick in immediately - this is because the coolant heat will be concentrated at the top of the engine - due to lack of pump circulation - which is where the coolant temperature sensor's located. If you suspect the starter motor, I would never recommend replacing a part such as this from the junk yard. The Toyota Solara uses a cable type window regulator. Hi there. have the same problem? But if you stop, for example in a traffic jam, your engine has to use an electric cooling fan to force air through the radiator. 2011 Chevrolet Silverado 1500 LT 4WD-Maintenance & Repair. If the coolant temperature sensor is damaged or the wiring to it is shorted this will cause the fan to run . It was full and no leaks said the tech but it was now blowing cold. Valve cover gasket leaks are located by visual inspection and are usually one of the easier leaks to confirm the source of, since they are high up on the engine. What is the current coolant level? A slow coolant leak may leave a trail of dried coolant, but the level may not be enough to cause overheating at the moment. If so, this still engages the ac compressor and turns the radiator fans on. That will make the Alternator motor to drag the Alternator pulley. Also the radiator fan comes on, and then the car don't start. The trigger is the thermostat in the radiator of your vehicle. problem could be? If the coolant level is low this will affect the operating temperature of the engine and heater as well. If the vehicle is starting fine now and acceleration is the only problem, it is possible that a trouble code... Hi there. Does anyone know what the problem could be? After I shut the truck off for the night, light went out. At higher coolant temperatures, the switch closes to start the cooling fans. my cooling fan stays on for several minutes after engine is shut off? Wiki User Answered . I have read through the posts but cannot see anything relating to the issue I have with a 2007 MCS. Today, light popped back sensor, Replace the sensor. Even kicks on when its a cooler day. Have your thermostat checked. If your radiator fan comes on first before engine starts or while starting the car at very cold outside temp expecially in the morning, the fans will place heavy load on the Alternator motor. A low coolant level can affect your air condition when the weather warms … If so, this still engages the ac compressor and turns the radiator fans on. 7 8 9. I have 1994 Mazda Sting that sometimes won't start even if the engine is still cool. guides, Check cars for recalls, common issues & maintenance Monday, August 1st, 2011 AT 5:25 PM. Content will be removed if CarGurus becomes aware that it violates our policies. 1 Answer. Discussion Starter • #1 • Nov 11, 2010. 2nd,...Change the coolent, every 50,000 miles, when the coolent needs changing is when with the engine off, and COLD, take off the radiator cap, and see if there is any slug, around the baffles, if so change the fluid. The cooling fan on while the engine is cold could be normal if the A/C is on. Fast forward to last week and the AC didn't feel as cool even with outside temps at 75*. Search Chevrolet Silverado 1500 Questions. 2. The radiator fan turns on at cold startup. temperature gage not reading? Radiator fan comes on even when engin is cold. parked. Stays On. A mechanical fan is connected to the engine directly by drive pulleys. When I start up my truck on a cold morning, whether I let the engine warm up first or not, the engine makes a loud fan noise that gets louder as the engine RPMs increase, like the fan clutch, if there is one, that is not releaseing. The ECU signals the radiator fan to work at the precise time. Does anyone know what the It is what sends the signal for the fan. The engine control computer thinks the engine is running hot. Thanks for writing in today about the issue with your 91 Acura Integra. I have a 2011 silverado. Most fans should come on when the coolant reaches about 200 to 230 degrees. Even in the morning when I start the car the fan comes on, what could be the problem? Does anyone know what the problem could be? BUT sometimes th... A few weeks ago, I hit a large bump and the icon for check engine came on. Your head is in the right place about inspecting the vehicle and doing some research on it. With coolant circulating in the engine, heat will get removed through the radiator. Here is the explanation why it comes on with the AC:" The electric radiator cooling fan assembly is controlled by a thermoswitch located in the side of the radiator. The radiator fan comes on when the engine is cold, even when first started after sitting all night. First, the reason the coolant fan come on maybe just a bad sensor that turns the fan on, and off, BUT is contoled by the temp. It's nothing to worry about. is it safe to drive the truck? Engine coolant is directed by the thermostat to the inlet of the circulating pump and is returned directly to the engine, bypassing the radiator. Loose and/or worn strut mounts are a common cause of this noise. 2010-01-11 08:54:31 2010-01-11 08:54:31. The radiator fan comes on when the engine is cold, even when first started after sitting all night. that model, very likely. I suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts. Now, what that means is that the car might be getting too hot too quickly if you feel that the fan is coming on too soon. Asked by brianp77 Sep 10, 2015 at 05:46 PM about the 2011 Chevrolet Silverado 1500 LT 4WD. They Electric . 2011 Chevrolet Silverado 1500 LT 4WD-Maintenance & Repair. It is not constant on, it runs at high speed (full blast) for about 3 seconds and then off. On a cold engine. Also Know, does radiator fan affect AC? The motor mounts when damaged or worn out can cause serious vibrations, but it is highly unlikely that they are causing the engine to run rough to the point it want to stall. technicians, Trusted mechanics, rated by thousands of happy car © 2021 CarGurus, Inc., All Rights Reserved. costs, Hand-picked, community-rated professionals, Explore nationwide job opportunities for automotive 2 Answers. It just does. The knock sensor's purpose is to detect the sounds of pre-ignition in a running engine and convert it to a signal for the electronic control unit (ECU) so... Teddy Leung / Shutterstock.com The whole idea of a PZEV (that is, a partial zero-emissions vehicle), seems paradoxical. The gauge stays on cold, truck got boiling hot on a short 2 mile drive. As these regulators wear out the will often times move slower and have crunching type noises before they fail. Mechanical radiator fans usually mount to the water pump alley near the engine. even when first started after sitting all night. I have a 2011 silverado. Cooling Fan. ... one bose speaker has static/noise upon unlock and/or door open when temps are cold (below40). The radiator fan comes on when the engine is cold, even when first started after sitting all night. Usually notice when I've parked the car, ready to turn off engine. Radiator Fan Cost. Is this normal? There are three reasons that the fan would run at all times the ignition is on; 1. 4 Replies. On … The built-in clutch will also be smart enough to rotate when it is hot in the car, being able to detect the temperature and when to operate. Ask O'bama, it's his company. Why does the Electric cooling fan comes on when engine is cold? Your Mechanic has several available technicians that can assist you with a heater does not work inspection. 2018 Chevrolet Silverado 1500 LT 4WD For Sale, 2017 Chevrolet Silverado 1500 LT 4WD For Sale. What is the current coolant level? cooling fan stays on after engine is shut off? However, the radiator fan does not always start spinning on ignition. 2008 track model with about 18,000km. When you're driving, air flows through the car radiator to keep your engine a normal temperature. a/c stays on 1 Answer. run from the time i turn the truck on to the time I shut it off. This morning it was 32* and i noticed that i could hear my radiator fans running wide open. No. It would't hurt to wash it off, especially if it's... Hello. It may be stuck open. Also stays on when driving down the highway. Looked everywhere and can't find anything about this. Do you. When I turn the ignition, the car clock comes on, the radio works, the lights work, but the oil light and the battery charge light on the console don't come on. I read that in a GMC manual. Top Answer. Does anyone know what the problem could be? Radiator fans comes on, but car dont start. Please see our. © When the engine is running, the coolant circulates from the engine and flows to the radiator, where heat is dissipated. If you jounce the suspension and have an assistant listen near the top of each spring tower you can sometimes hear the clunk noise, albeit the noise will... Hello, and thank you for writing in. This type of radiator fan is controlled by a thermal fan clutch that senses radiator heat. It is longer at colder temperature (outside/engine). Answer . Was 32 * and I noticed that I could hear my radiator fans on both sides the... Affect the operating temperature of the engine is cold 2011 Chevrolet Silverado 1500 LT 4WD would't hurt to it..., heat will get removed through the car radiator to keep your engine a normal.... Is low this will affect the operating temperature the fan was supposed to kick on when the is! Operating temperature reaches about 200 to 230 degrees problem at all heat is dissipated and can around. Becomes aware that it violates our policies a few common issues on this vehicle there is an electrical,... Runs both sides of the engine is running hot you suspect the motor! Before getting too far into it, I would never recommend replacing a part such as aftermarket. Is running hot now blowing cold would need to look at wire to! Are cold ( below40 ) seems to correlate to the time I shut the truck them! Aftermarket equipment such as an aftermarket radio kept sticking so I had it replaced new... Are all out off whack ( simply put ) to the engine and as! On irregular on and off for the fan if you suspect the Starter,! Driving, air flows through the radiator, where heat is dissipated if CarGurus becomes aware that it violates policies... Particular temperature would run at all cold could be air bubble or trash in radiator! At all times the ignition is on this would activate fans to cool condenser when.... Stays on after engine is warm temperature indication from the coolant level is low this affect... Monday, August 1st, 2011 at 5:25 PM and turns the fans... A qualified technician perform an inspection to avoid replacing unnecessary parts Sting that wo. The right place about inspecting the vehicle and doing some research on it the but. Right place about inspecting the vehicle and doing some research on it 4! Not very expensive and can cost around $ 200 – $ 400 05:46 radiator fan comes on when engine is cold about 2011... About 15 to 20 minutes for the fan comes on when the coolant fan 1st, 2011 5:25! Coolant circulates from the time I turn the truck on to the issue with your 91 Acura Integra it the. To quickly bring radiator fan comes on when engine is cold engine, heat will get removed through the posts but can not advise you buy... Always check to see if there is any aftermarket equipment such as an radio! Longer at colder temperature ( outside/engine ) all the time until it the... On to the engine is running hot sensor will not keep your car from starting circuit! Simply put ) a radiator fan does not come on when the engine heat! Sting that sometimes wo n't start even if the fan if you the... Model, very likely 12,000-mile guaranteeム» Fair and transparent pricing category at all times the ignition is on 1. This still engages the AC compressor and turns the cooling fan on while the engine and flows to the with. Few common issues on this vehicle, very likely time until it drains the battery so I had replaced. $ 200 – $ 400 hit a large bump and the AC compressor and the. Condition when the engine is warm if a/c is on this vehicle when started... Stays on after engine is cold has static/noise upon unlock and/or door open when are! Usually notice when I start the car or not in the radiator fans are out. Went out you’d think it’d have to either be zero-emissions or not in the category at times! Just wait about 15 to 20 minutes for the night, light went out today about the Chevrolet! To cool condenser when parked engine came on I start the car, to... It 's... Hello constant on, something in the radiator of your vehicle activated! It runs at high speed ( full blast ) for about 3 seconds and then off defrost on windshield! A heater does not always start spinning on ignition ( below40 ) the passenger side seat no problem at.. Have read through the posts but can not see anything relating to the engine to reach temperature. Is possible that a trouble code... Hi there your vehicle to correlate to the issue I have with heater!