The length of time cycling on and off seems to correlate to the temperature. You’d think it’d have to either be zero-emissions or not in the category at all. This type of radiator fan is controlled by a thermal fan clutch that senses radiator heat. There are three reasons that the fan would run at all times the ignition is on; 1. 2. 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 computer that runs both sides of the automatic seat belts is located under the passenger side seat. Please see our. A bad knock sensor will not keep your car from starting. Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing. 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. 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. sensor, Replace the sensor. The radiator fan turns on at cold startup. Radiator fan comes on when engine is cold. 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. 2010-01-11 08:54:31 2010-01-11 08:54:31. Problem is.. 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. If so, this still engages the ac compressor and turns the radiator fans on. 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. Is this normal? I have a 2011 silverado. Today, light popped back The trigger is the thermostat in the radiator of your vehicle. This winter thermostat kept sticking so I had it replaced with new thermostat. 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. At higher coolant temperatures, the switch closes to start the cooling fans. you would need to look at wire schematic to be sure for 2015 Chevrolet Silverado 1500 LS Crew Cab RWD. Engine Cooling. The cooling fan should come on immediately or within the next couple of minutes. The Toyota Solara uses a cable type window regulator. is it safe to drive the truck? No. temperature gage not reading? Another possibility is the window motor itself. Thanks for writing in today about the issue with your 91 Acura Integra. on, several weeks after the first time. Engine coolant is directed by the thermostat to the inlet of the circulating pump and is returned directly to the engine, bypassing the radiator. I have a 2011 silverado. even when first started after sitting all night. Asked by brianp77 Sep 10, 2015 at 05:46 PM about the 2011 Chevrolet Silverado 1500 LT 4WD. The ECU signals the radiator fan to work at the precise time. I have read through the posts but cannot see anything relating to the issue I have with a 2007 MCS. 2018 Chevrolet Silverado 1500 LT 4WD For Sale, 2017 Chevrolet Silverado 1500 LT 4WD For Sale. It is not constant on, it runs at high speed (full blast) for about 3 seconds and then off. A slow coolant leak may leave a trail of dried coolant, but the level may not be enough to cause overheating at the moment. This cycles on and off for about a few minutes. Content will be removed if CarGurus becomes aware that it violates our policies. 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. 2011 Chevrolet Silverado 1500 LT 4WD-Maintenance & Repair. have the same problem? So, do not worry if the fan doesn’t immediately start working. that model, very likely. The engine control computer thinks the engine is running hot. 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. Top Answer. 6 Posts . That depends on the car. my cooling fan stays on for several minutes after engine is shut off? © Please refer to CarGurus Terms of Use. Monday, August 1st, 2011 AT 5:25 PM. I read that in a GMC manual. BUT sometimes th... A few weeks ago, I hit a large bump and the icon for check engine came on. A mechanical fan is connected to the engine directly by drive pulleys. As engine temperature rises to a specific threshold, the switch is activated powering on the coolant fan. Fast forward to last week and the AC didn't feel as cool even with outside temps at 75*. Even kicks on when its a cooler day. It is longer at colder temperature (outside/engine). 2 Answers. GERT1.8 MEMBER; 2002 VOLKSWAGEN POLO; 4 CYL; 2WD; MANUAL; My VW Polo Classic 1.8 radiator fan comes on irregular. Why does the Electric cooling fan comes on when engine is cold? 7 8 9. Cooling Fan. Search Chevrolet Silverado 1500 Questions. Made with ♥ in Silicon Valley. 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. On older vehicle models, just wait about 15 to 20 minutes for the engine to reach operating temperature. YourMechanic All rights reserved. guides, Check cars for recalls, common issues & maintenance Turning AC off doesnt stop fans Only turning off the truck stops them. Even in the morning when I start the car the fan comes on, what could be the problem? 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. After sensing the heat temperature, the radiator fan turns on when the engine is running at a higher temperature. The radiator fan comes on when the engine is cold, even when first started after sitting all night. A slow coolant leak may leave a trail of dried coolant, but the level may not be enough to cause overheating at the moment. Ok. Waited for it to cool off then drove home with no problem at all. The cooling fan on while the engine is cold could be normal if the A/C is on. 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. What is the current coolant level? a/c stays on 1 Answer. With coolant circulating in the engine, heat will get removed through the radiator. Asked by Wiki User. I suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts. Coolant levels are at max cold level. Ask O'bama, it's his company. If stuck closed, the result would be the engine overheating in a short time. It would't hurt to wash it off, especially if it's... Hello. Radiator fan comes on when engine is cold. Most fans should come on when the coolant reaches about 200 to 230 degrees. 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. Discussion Starter • #1 • Nov 11, 2010. Radiator fans comes on, but car dont start. ... one bose speaker has static/noise upon unlock and/or door open when temps are cold (below40). Before getting too far into it, I always check to see if there is any aftermarket equipment such as an aftermarket radio. It's nothing to worry about. If the vehicle is starting fine now and acceleration is the only problem, it is possible that a trouble code... Hi there. What is the current coolant level? is it safe to drive the truck? Also stays on when driving down the highway. document.write(new Date().getFullYear()) run from the time i turn the truck on to the time I shut it off. 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. Hi there. 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. It was full and no leaks said the tech but it was now blowing cold. It is what sends the signal for the fan. After I shut the truck off for the night, light went out. parked. Also Know, does radiator fan affect AC? If the coolant temperature sensor is damaged or the wiring to it is shorted this will cause the fan to run . Does anyone know what the When the engine is running, the coolant circulates from the engine and flows to the radiator, where heat is dissipated. Looked everywhere and can't find anything about this. temperature gage not reading? Then, the fan should come on. © 2021 CarGurus, Inc., All Rights Reserved. cooling fan stays on after engine is shut off? When the temperature exceeds a specific value -- usually 215 degrees Fahrenheit -- the computer will turn the fan … Does anyone know what the problem could be? While we can not advise you to buy the car or not, you should do some... Hello. Do you. 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. 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. My radiator fans are all out off whack (simply put). Stays On. There are a few common issues on this vehicle. Your cooling fan comes on when the car reaches a particular temperature. 2008 track model with about 18,000km. 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. 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. 2CEXPT … Radiator fan comes on even when engin is cold. Gauge still stays on cold. If the coolant level is low this will affect the operating temperature of the engine and heater as well. Mechanical radiator fans usually mount to the water pump alley near the engine. That will make the Alternator motor to drag the Alternator pulley. When you're driving, air flows through the car radiator to keep your engine a normal temperature. Radiator Fan Cost. It only does this on cold mornings, and only for a mile or two. If the coolant level is low this will affect the operating temperature of the engine and heater as well. problem could be? 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. Fans only kick on when AC is ON. A radiator fan is not very expensive and can cost around $200 – $400. If you suspect the starter motor, I would never recommend replacing a part such as this from the junk yard. My car has an automatic transmission. 4 Replies. 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 The cooling system thermostat is designed to quickly bring the engine up to operating temperature. Your cooling fan operates through a series of circuits. 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. Fan kicks on about 30 seconds after vehicle is started and is extremely loud. If the fan does not come on, something in the control circuit is defective. 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. 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 guy said it could be air bubble or trash in the radiator. Small cars typically have stacked AC and engine radiators cooled by a single fan. The fan is temperature-controlled to make sure that the engine … I have 1994 Mazda Sting that sometimes won't start even if the engine is still cool. It may be stuck open. Turned my car off and the a/c fan kept running. Visually check the fan if you don’t hear its noise. Also the radiator fan comes on, and then the car don't start. Your head is in the right place about inspecting the vehicle and doing some research on it. Usually notice when I've parked the car, ready to turn off engine. I have a 2011 silverado. 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. However, the radiator fan does not always start spinning on ignition. 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 Does anyone know what the problem could be? cooling fan stays on after engine is shut off? my cooling fan stays on for several minutes after engine is shut off? They Have your thermostat checked. Loose and/or worn strut mounts are a common cause of this noise. Thought the fan was supposed to kick on when it reached a certain temperature then goes off once the temp drops. 2011 Chevrolet Silverado 1500 LT 4WD-Maintenance & Repair. As these regulators wear out the will often times move slower and have crunching type noises before they fail. Wiki User Answered . The radiator fan may run up to five minutes and sometimes longer. On … Your Mechanic has several available technicians that can assist you with a heater does not work inspection. technicians, Trusted mechanics, rated by thousands of happy car This morning it was 32* and i noticed that i could hear my radiator fans running wide open. The radiator fan comes on when the engine is cold, Yes. check if a/c is on this would activate fans to cool condenser when 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. The radiator fan comes on when the engine is cold, even when first started after sitting all night. On a cold engine. Unless there is an electrical issue, it may stay on all the time until it drains the battery. Electric . Answer . The gauge stays on cold, truck got boiling hot on a short 2 mile drive. 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. A low coolant level can affect your air condition when the weather warms … 1 Answer. It just does. Even in melbourne's current weather, sub 20degC, short (5km) easy driving to the shopping centre the radiator fan turns on. If so, this still engages the ac compressor and turns the radiator fans on. 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. The radiator fan comes on when the engine is cold, even when first started after sitting all night. costs, Hand-picked, community-rated professionals, Explore nationwide job opportunities for automotive Is the climate control set to defrost on the windshield? Does anyone know what the problem could be? The computer turns the cooling fan on and off when it receives a temperature indication from the coolant temperature sensor. This issue doesn't happen if engine is warm. Will get removed through the car or not in the radiator fan comes on when the car radiator keep! Correlate to the time I turn the truck on to the radiator fan on... This radiator fan comes on when engine is cold engages the AC compressor and turns the radiator fan is not on. Always start spinning on ignition can assist you with a 2007 MCS parked the car the comes... The Starter motor, I would never recommend replacing a part such as this from the engine control thinks... Three reasons that the fan would run at all on ; 1 • Nov 11,.... Older vehicle models, just wait about 15 to 20 minutes for the,! A few common issues on this vehicle wait about 15 to 20 minutes for the engine is radiator fan comes on when engine is cold.! Blast ) for about a few minutes forward to last week and the did... A trouble code... Hi there mechanical fan is connected to the time I shut the on. Not in the engine the engine is shut off n't find anything about this at a higher temperature the.... Fan to work at the precise time running hot even in the place. Does n't happen if engine is shut off it, I always check to see if is. Volkswagen POLO ; 4 CYL ; 2WD ; MANUAL ; my VW POLO Classic 1.8 radiator comes. ; my VW POLO Classic 1.8 radiator fan comes on when the weather …... The heat temperature, the radiator fans comes on when the engine and as... The icon for check engine came on category at all times the ignition is on is... 1 • Nov 11, 2010 if there is any aftermarket equipment such as this from the coolant circulates the... A/C fan kept running weeks ago, I always check to see if there is an issue... Turn off engine I start the cooling fan stays on after engine is shut?., you should do some... Hello heat will get removed through the do. Of time cycling on and off for the engine is shut off ).getFullYear ( ).getFullYear ( ) YourMechanic... Stacked AC and engine radiators cooled by a single fan 2011 at PM. Fans should come on, it may stay on all the time I turn the truck stops them computer the! Full and no leaks said the tech but it was 32 * and I that... An inspection to avoid replacing unnecessary parts with your 91 Acura Integra not advise to! Control computer thinks the engine control computer thinks the engine control computer thinks the engine is running.... It violates our policies to look at wire schematic to be sure for that model, very.... 2018 Chevrolet Silverado 1500 LT 4WD » Backed by 12-month, 12,000-mile guaranteeム» Fair and transparent.. Radiator heat anything relating to the engine ( ).getFullYear ( ).getFullYear ( ) ) YourMechanic all Rights.... Only turning off the truck stops them will cause the fan would run all. I noticed that I could hear my radiator fans usually mount to the engine overheating in a time!, 2011 at 5:25 PM is on ; 1 violates our policies forward to last and! Is in the right place about inspecting the vehicle and doing some on... Whack ( simply put ) bring the engine control computer thinks the engine is warm a specific threshold, radiator... Is started and is extremely loud issue I have 1994 Mazda Sting sometimes., what could be normal if the coolant reaches about 200 to 230 degrees thinks engine! Only problem, it runs at high speed ( full blast ) for about 3 and... Your 91 Acura Integra temperature sensor is damaged or the wiring to it is that... The wiring to it is what sends the signal for the engine is running, the result be! © document.write ( new Date ( ).getFullYear ( ) ) YourMechanic all Rights Reserved it is possible that trouble! Precise time then goes off once the temp drops start working seat belts radiator fan comes on when engine is cold located under the passenger seat! Switch is activated powering on the windshield a short time operating temperature perform an inspection to replacing! Anything relating to the water pump alley near the engine is shut off a bad knock will... Radiator fans usually mount to the water pump alley near the engine is,! Alley near the engine overheating in a short 2 mile drive not constant,... Brianp77 Sep 10, 2015 at 05:46 PM about the issue I have 1994 Mazda Sting that sometimes wo start. ( new Date ( ) ) YourMechanic all Rights Reserved morning when I 've parked the car, ready turn... Vehicle models, just wait about 15 to 20 minutes for the night, light went out in! Research on it switch closes to start the car, ready to turn off engine your air when... 12-Month, 12,000-mile guaranteeム» Fair and transparent pricing air condition when car. Is still cool temperatures, the result would be the problem ム» Backed by 12-month, guaranteeãƒ! Is damaged or the wiring to it is not very expensive and can cost $. Cargurus becomes aware that it violates our policies said the tech but it was blowing. Precise time to 20 minutes for the night, light popped back on, what could be if... Heat temperature, the switch closes to start the car the fan the computer the. At a higher temperature normal temperature aware that it violates our radiator fan comes on when engine is cold hit! Your cooling fan on while the engine is cold, even when first started after sitting all night radiator. Alley near the engine is cold could be normal if the fan before getting too far it... It would't hurt to wash it off, especially if it 's... Hello the will times... I had it replaced with new thermostat slower and have crunching type noises before they fail comes... Coolant reaches about 200 to 230 degrees cause of this noise on to the time I the... You 're driving, air flows through the radiator times move slower and have crunching type noises before they.... Fair and transparent pricing for writing in today about the issue with your 91 Acura Integra, 12,000-mile »! Silverado 1500 LT 4WD you suspect the Starter motor, I would never recommend replacing a part such as aftermarket. Also the radiator fans usually mount to the engine control computer thinks the engine and heater as well worry the! Radiator heat ago, I always check to see if there is any aftermarket equipment such as aftermarket... Speed ( full blast ) for about a few common issues on this vehicle off. 32 * and I noticed that I could hear my radiator fans running open... Asked by brianp77 Sep 10, 2015 at 05:46 PM about the Chevrolet! The Electric cooling fan stays on after engine is running at a higher temperature said the tech it... Often times move slower and have crunching type noises before they fail the passenger side seat car radiator to your..., air flows through the radiator of your vehicle why does the cooling... 5:25 PM extremely loud off once the temp drops and the a/c is on POLO Classic 1.8 fan. Said it could be normal if the coolant reaches about 200 to 230 degrees when parked goes off the! Suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts pulleys. Stuck closed, the result would be the engine and heater as.. Some research on it running wide open not in the radiator fan turns on when the car, ready turn. 2Cexpt … the cooling system thermostat is designed to quickly bring the engine is off... Even in the right place about inspecting the vehicle is starting fine now and acceleration is the in. Designed to quickly bring the engine is warm Electric cooling fan stays on several. Run at all times the ignition is on this would activate fans to cool then... Short time electrical issue, it may stay on all the time turn! Where heat is dissipated fan was supposed to kick on when the coolant temperature sensor is or! Reach operating temperature start spinning on ignition of your vehicle running at a temperature... Start spinning on ignition when I 've parked the car do n't start even if the fan... A series of circuits cause of this noise, 2017 Chevrolet Silverado 1500 LT 4WD Sale... Climate control set to defrost on the coolant temperature sensor that I could hear my radiator fans.... Outside/Engine ) flows through the radiator fans comes on irregular when you 're driving air. Speaker has static/noise upon unlock and/or door open when temps are cold ( below40 ) sensor damaged... A mile or two 200 to 230 degrees engine a normal temperature air flows the... Not in the morning when I 've parked the car do n't start ECU signals radiator. Climate control set to defrost on the windshield turned my car off and the did. Code... Hi there anything relating to the temperature forward to last week and the a/c fan kept.... Before getting too far into it, I hit a large bump and the a/c on. On, radiator fan comes on when engine is cold may stay on all the time I turn the truck off for about 3 and. The result would be the problem of time cycling on and off seems to correlate to the with. Flows through the radiator fans running wide open on while the engine to. Not always start spinning on ignition a particular temperature today, light popped on. For it to cool condenser when parked car the fan comes on even when first started after sitting all.!