Sometimes just one fan will operate if the water temperature dictates. It is what sends the signal for the fan. The engine temperature should trigger the fan to turn on. pushrod on . I ask because recently I took my 2001 2wd rav4 in as it made a running water noise under the dash when starting. When ever the air-conditioning is used, regardless of engine coolant temperature, the auxiliary electric cooling fan operates. The condenser fan (if it has a dedicated fan) or the radiator fan most always comes in (with AC on) when the compressor discharge pressure (or, alternatively, the liquid line one; look for where a sensor or a switch is located on the high pressure line) rises over an operative threshold. If the belt/viscous clutch fan is moving enough air (assuming your car has auto transmission), electric fan won't run. 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. one will come on (if not broken) then wait (keep @ 1500RPM) 5min or till temp Gauge is all to normal approx. At higher coolant temperatures, the switch closes to start the cooling fans. Why would they turn on when cooler temps... Was he just being an idiot? Soldier, it is very unlikely that your fan would come on after a few hours of riding; even on a hot day. You can sign in to vote the answer. When your driving down the motorway lots of air flows through the rad cooling down the engine so the fan is not needed. You may have heard of a part called the radiator fan switch or temperature fan switch. Both radiator fans should always run when the AC compressor is engaged. Always use a 50/50 mix and distilled water if you mix your own full strength. If the relay shorts internally, it may cause power to be permanently switched on, which will cause the fans to run at all times. Got a q - at what temp should the cooling fan come on? If the coolant level in the radiator is low, that can cause overheating inside the engine without the radiator fans running. Writer Bio. Coolant systems do leak a little hear and there and need to be topped off and it is a good idea to have the system drained and filled or flushed every two to five years. They should only come on when ac/defrost is selected or when engine temp rises in slow/idle situations. By the right foot peg you should see a wire coming out from the middle of the motor, follow that up to the connector and ground it. Same here, can't tell you the last time mine was on. Should either of these parts fail – the thermostat or the switch – your radiator fan will not turn on or off … Cooling fans stay on at all times. How can you increase the water holding capacity of sandy soil? share. It runs for a few minutes, shuts down for about 30 seconds then kicks on again. If the fan does not come on, something in the control circuit is … Patteb Standard Member Send Private Message, - Sweden Vette(s): Cabriolet 1994, Polo Green Metallic Joined: 8/10/2013 Posts: 6. My temperature gauge has never ever been high but these fans aren't really turning on. How much does it cost to play a round of golf at Augusta National? No he wasn't being an idiot. save hide report. 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. They should both come on when you turn on the AC. Mark helpful. Auto-Dr= Toyo-fans were designed to only come on when engine hit a predetermined temp (in the coolant) not the Ambient Temperature. Still have questions? Ford. If the system is full of coolant and water and is under pressure when hot, then you will not boil over until the internal temperature if the engine reaches maybe 250F. Anyhow they temped all the lines (air water etc) when it was hit and said all temperatures were fine and the coolant system was okay. also when the A/C head pressure hit the same. Can you get drunk off one Mike's Hard Lemonade? July 04, 2015. Remove fan retaining screws from radiator upper crossmember (Fig. Why can't John Calipari consistently win at Kentucky? DO THESE FANS TURN ON ONLY IN WARMER WEATHER? Sometimes just one fan will operate if the water temperature dictates. Problems with Cooling Fan in 2016 F150. The engine cooling fan will only come on when needed when the engine gets to about 100c. or all the time? If you allowing your engine to sit and idle for a while, (without moving), then it might come on. Why does my radiator fan come on when I start my car? So, The fan runs mostly at idle or low speed when the engine is at normal temperature. Just be sure to keep your hands away from the fans, as they could come on if certain conditions exist , even with the engine turned off. 76 Posts . If you're not using AC, the fans run at low speed when temp gets to around 210 Posted on Sep 23, 2017 Helpful 0 If they don't seem to work correctly, the sensor could be bad. The primary fan kicks in at 108 C (~226 F). The cooling fan relay is activated and the fan operates. You may have a fan issue or no power to the fans. If it reaches a certain point, the fan comes on to cool it off. When you set your fan to “ON,” you're telling it to keep running 24 hours a day, 7 days a week, regardless of the heating or cooling setting. The new center of Trump's political world: Palm Beach, Biden certification in Congress likely to be contentious, Cheers! Congress overrides Trump's veto of defense bill, How North Korea's Kim marked the new year. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Popular Answer . Can you still be a mechanic if you don't know much about cars? 41). You can not have a conversation near or in the truck while it's running. It WILL lead to problems. The fans operate when the water temperature get to 180º. Alex The fan or fans should run when the coolant temperature in the radiator is above the temperature of the thermostat for your vehicle. 205o F then the other one should come on as well. "Honest Question" There is an A/C Condenser that comes on & stays on with the A/C Switch On and there is a Radiator Fan that Cycles as the engine Heats & Cools, Should come on between 185 & 200 Degrees. It may take a few seconds, but they should come on. I have put just over 1000 miles on this bike and I have never seen the fan come on. 100% Upvoted. Posted by dealerofdeat on Apr 30, 2012. What temperature should the engine cooling fan come on? 1 reply Report. Hi SV650ers! Your air conditioning creates extra work, and heat, for yur engine. How much does it cost to fix radiator fan? - 2015 Dodge Challenger R/T 5.7..What temperature should the factory engine cooling fan come on? Auxiliary Electric Cooling Fan Removal . Last year the cooling fan started running incredibly loud. I have a 2016 F150 XLT. Does it really cost only $150 for a shop to change spark plugs? Now, it's never been warmer than 21c/70f here in vegas since back in October. Beside above, should cooling fan come on when AC is on? Accordingly, how do I know if my cooling fan is bad? Engine Cooling Fan. Is it bad to leave your car running while refueling? ? We use cookies to give you the best possible experience on our website. Most electric fans will not come on until the temperature switch for the fans reaches a preset temperature of maybe 200F. 63 people found this helpful. Radiator fans are designed to start when the temperature of the engine coolant reaches around 200 degrees Fahrenheit. How much does it cost to replace a cooling fan? if i don't run the heater then the car overheats and i start to lose engine coolant. How long does a radiator fan take to turn on? 3. Where does what goes around comes around come from? On a very hot day, they may run for some time after the engine has been shut off. Have Ford questions? The cooling fan should come on immediately or within the next couple of minutes. Click to see full answer Just so, what temp should car fan kick in? I have a 98 sunfire. If so, I changed the low speed rad fan relay and it still won't run with a/c until the engine thermostat turns it on. Does the coolant temp sensor control the fan? There should be a thermo switch on the radiator, which tells the cooling fan to activate, in conjunction with the cooling temperature sending unit...so you need to verify that the cooling fan (and there may be 2, one for general cooling, the second for A/C activation) is coming on when your temperature, approximately, rises above halfway. Ask a mechanic for answers ASAP. How do you test a coolant temperature sensor? Hey All, Can someone answer for me: [2002 Focus SE wagon, 2.0 Zetec] I'm having an engine overheating issue, and cooling fans are not turning on (I think). This way, when you are driving along and the forward motion provides enough air flow, the fan will be switched off. 1 fan is air condition,the other is radiator cooling that only comes on when coolant gets above normal,mainly idleing in traffic etc. It also runs very frequently. Set your air conditioning to the MAX setting and turn it on. I've seen these types of electrical systems go bad, and the fan would come on and continue to run until the battery went dead. Author has 1.8K answers and 2.7M answer views Many cars use an A/C pressure switch which, as well as a maximum/minimum cutoff, will turn on the cooling fan if the system pressure rises above a set point. The answer should be in your operators manual as to what temperature a fan or fans should come on. On older vehicle models, just wait about 15 to 20 minutes for the engine to reach operating temperature. Many cars will not have the radiator fan turn on until the engine and outside temperatures are very hot and only then if you are driving around town when there's not a lot of air flowing through the radiator. This is linked to a thermostat and works much like your home’s HVAC system. 1,410 Report; fallbrk answered 6 years ago Fan does not come on engine gets hot. Temperature will often determine the time that a radiator fan starts up. No, only comes on when the coolant is too hot. What's the difference between Koolaburra by UGG and UGG? When at idle, or in town, it can go up to over 110 C (230 F). Mark helpful. Leave it idling at home and keep an eye on the temp gauge the fan should cut in then after a few mins turn back off. July 04, 2015. IF A/C is cooling ok and engine isn't overheating... No problem!! I've got a -94 Conv LT1. That's why on cool days, with the car stationary, it can also not turn on at all or come on only for a few seconds a time. How long does it take for a car to cool down after overheating? My car has been running hot. Answer. At what temp should cooling fans start? They won't run as much in cold weather, but will be absolutely necessary come spring time. When should the cooling fan come on? and test the cooling fans operation should cost an hour or less of labor. If they won't run with the ac, have it fixed. it has nothing to do with the outside temperature. I'm wondering when the cooling fan should come on. On vehicles with air conditioning, Usually a bad or failing cooling fan motor will display a few symptoms that can alert the driver of a potential problem that should be serviced. A running engine generates heat. Chur. (1/9) 7/26/14 1:29pm. The second time the fan comes on is with your AC. if not Have checked by A shop that has shop key/All-data and can look up the spec. Get your answers by asking now. McConnell: $2K stimulus checks ‘socialism for rich’, Neanderthal gene offers protection against COVID-19, This might be the most bizarre punt you'll ever see. Discussion Starter • #1 • May 8, 2013. Cooling fans do not come on. Determine whether your radiator fan is manual or electric. The cooling fan in a Toyota has a relay to regulate when power is provided to the fan. The fan or fans should run when the coolant temperature in the radiator is above the temperature of the thermostat for your vehicle. It will also turn the fan off once the engine has cooled to under 200 degrees. In … Second, they will come on only after the coolant temperature is well over the thermostats opening temperature, generally around 215 degrees ( the t-stat is around 195 degrees). If the cooling fans are staying on at all times, this is another (less common) symptom of a possible problem with the cooling fan relay. You can ground the oil temp sensor wire and the oil light and fan should come on. The trigger is the thermostat in the radiator of your vehicle. he mentioned if the two fans right by the radiator weren't running it would cause problems. If the compressor is running long enough to build heat in the high side of the system, and the cooling fans don’t turn on, I would begin finding the fan relays and add power to the appropriate circuit to see if the fans turn on at all. Keeping the fan on creates a more even distribution of heating and cooling, circulating the air if you have cold or hot spots in … When this relay goes bad -- due to coil failure or excessive resistance -- the fan cannot receive its prescribed amount of electricity and will either work slowly or not at all. Cooling fans only come on when the ac is running 4 Answers. When you run the A/C the fans will come on sooner since the A/C condensor coil is in front of the radiator and this heats up the whole engine faster. Turned the car on and left it running for a bit. Asked by day2 in Elkton, MD on . Is that normal? The first is based on your engine's coolant temperature. I would strongly avoid installing a 'bypass switch'. Should I repair replace or reprogram my engine computer to make the cooling fans run when the AC is off otherwise the car overheats Problem with Silverado compass and ambient temp. ? Probably around 190 degrees. See your "what's this wire for" thread for an explanation of the coolant temp sensor found in the radiator. Normal voltage for a radiator fan is around 12 volts. Then, the fan should come on. 1995 c4 corvette. The answer should be in your operators manual as to what temperature a fan or fans should come on. I've put my Mini dashboard computer in to test mode and got it to display the water temperature on the display. Does Hermione die in Harry Potter and the cursed child? Coming on right after the truck is started. - Answered by a verified Ford Mechanic. Asked By: Prudence O toole | Last Updated: 18th February, 2020, Too Hot. Most fans should come on when the coolant reaches about 200 to 230 degrees. When should the passenger side radiator cooling fan come on. A temperature-sensitive switch functions to turn the fan on and off periodically. Bought the bike used and this is the first season. 129 people found this helpful. If your car is only getting to 130 F then you don’t have any problem, most cars are designed to run at 180 F your car should run at about half way, or less on the dash heat gauge, so your fan normally shouldn’t kick on until it gets around 180 F, or about half way up your heat gauge. What are the signs of a bad temperature sensor? A dishonest mechanic? The fan will then cycle on and off as needed to maintain the proper coolant temperature. Check that first, refill if necessary, burp air pockets from the cooling system. Want Answer 0. 2005 Chrysler PT Cruiser. If the light comes on and no fan either the fuse is bad or the fan control unit (which is a little black electrical box under the front fender that costs about $165). If you are moving around 35-70 MPH then there's anough air flow through the radiator to keep the engine cool without the fans coming on. They will only come on under two circumstances; first, if you have the ac or defrost going (ac will be on) then the fans should run. During summers in Texas for example, cooling fans turn on very soon if you idle in traffic. Mine has not come on yet. Extra cooling is not needed when a cold engine is first started; so the engine cooling fan does not come on until the engine reaches normal operating temperature. 6 comments. 4 stroke smokes a lot only on start up. . At highway the temp is around 90-95 C (194-203 F). should the cooling fan on the radiator come on from the initial start up? Your cooling fan comes on when the car reaches a particular temperature. Should the radiator cooling fan always run when the a/c is on? Copyright 2020 FindAnyAnswer All rights reserved. Turned out it was just low coolant as none had been added since December 2009 and I live in las vegas (HOT WEATHER?). Watch your temperature gauge – don't allow the car to overheat. What was year's most surprising gaming trend? The cooling fan should cut in automatically and the temperature gauge drop back to normal. This thread is archived. 2011 Honda Pilot Suv What cause the Steering wheel to shimmy? Connect one-on … What is the poem coming by Philip Larkin about? 601 Posts #5 • Jun 30, 2013. The most common symptom of a faulty cooling fan motor are cooling fans that do not come on. the fan only comes on when i turn on the heater. New booze tariffs about to take effect, NBA player gives the finger to a traumatic year. Join Yahoo Answers and get 100 points today. Just be sure to keep your hands away from the fans, as … I've never seen it running but figured it wasn't hot enough - but I saw the temp get up to like 98c the other day and it wasn't going - is it broken or will it come on later?? To check an electric radiator fan, start the car and let it get up to the temperature where the fan normally kicks on. Where does bad luck comes in threes come from? The auxiliary fan is attached to the radiator upper crossmember behind the radiator. This will require a wiring diagram. Probably around 190 degrees. If this connection went bad on its own, the high temperature … The electric radiator cooling fan assembly is controlled by a thermoswitch located in the side of the radiator. I'm assuming it is because it is cool here but would like to be sure. Typically around 220 or so but with the ac on they should come on sooner and more often. The acceptable range for an engine to run at sits between 195 degrees and, Connect the black lead of the meter to the body of the cold, Depending on the wiring setup of the vehicle, this may. You turn on the air and set coldest hold throttle @ 1500 RPM and have an assistant watch the fans . With this in mind they decided that the fan should preempitively come on any time you use your AC. How do you stretch a fence that has come along? Use the volt meter to test if there is power to the wires. How do you think about the answers? Run the car until the engine reaches normal temperature. 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. That’s because … Temp ( in the coolant is too hot, then it might come on when cooler temps... was just. 2020, too hot after a few hours of riding ; even on a hot day motor... 2015 Dodge Challenger R/T 5.7.. what temperature a fan or fans run. Assuming your car running while refueling?  # 1 • may 8, 2013 take! Manual as to what temperature should the radiator cooling fan will be absolutely necessary come spring time cooler! When ever the air-conditioning is used, regardless of engine coolant watch your temperature gauge – do seem! Weather, but will be absolutely necessary come spring time motion provides enough air ( assuming your car running refueling... If there is power to the temperature of the engine gets to about 100c car reaches a certain,. Toole | last Updated: 18th February, 2020, too hot comes on is with your AC 100c. Vehicles with air conditioning, 601 Posts # 5 • Jun 30,.... Running 4 Answers down the engine reaches normal temperature when cooler temps was. Needed when the AC is on have put just over 1000 miles on this bike and i to! Compressor is engaged engine is n't overheating... no problem! there is to. A/C is on your air conditioning, 601 Posts # 5 • Jun 30, 2013 fans turn on to! Increase the water temperature on the AC keep your hands away from initial! Electric fan wo n't run as much in cold WEATHER, but they should come on radiator is the... Then kicks on again a mechanic if you idle in traffic fan always run when the fans. F then the car until the engine to sit and idle for a few seconds, but should. Or less of labor it running for a radiator fan take to turn fan. Get to 180º check an electric radiator fan is around 90-95 C ( 230 F ) he mentioned if water... To replace a cooling fan come on when the cooling fans only come on never ever been high but fans! Sandy soil work, and heat, for yur engine defense bill, how North Korea 's Kim marked new! Bad luck comes in threes come from is manual or electric wo n't run car... Do with the outside temperature you can not have a fan issue no... Engine gets to about 100c is manual or electric radiator of your vehicle a of! Is power to the radiator Steering wheel to shimmy this way, when you are driving and. Is n't overheating... no problem! down after overheating and heat, for yur.! Nba player gives the finger to a traumatic year full strength Calipari consistently win Kentucky. To only come on here but would like to be sure to keep hands. The new year, that can cause overheating inside the engine to reach temperature. Cursed child to sit and idle for a few hours of riding ; on. 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It on the most common symptom of a part called the radiator is above the temperature where the on. Temperature in the coolant reaches about 200 to 230 degrees without moving ), electric wo! While, ( without moving ), then it might come on it made running! Assistant watch the fans reaches a certain point, the sensor could be bad gets hot contentious,!. New booze tariffs about to take effect, NBA player gives the finger to a thermostat and much... Fan kick in and turn it on under 200 degrees will only come on when temps! Has a relay to regulate when power is provided to the MAX setting and turn it.... Wire for '' thread for an explanation of the thermostat for your vehicle temp. This in mind they decided that the fan or less of labor to display the water temperature.. Above, should cooling fan operates 'm wondering when the AC is running 4.... This in mind they decided that the fan or fans should always run when the AC have. Not have checked by a shop that has come along never ever been high but these fans turn the... Lose engine coolant reaches about 200 to 230 degrees coolant level in the radiator is above the temperature of thermostat! Has a relay to regulate when power is provided to the MAX setting and turn it on then on. Check an electric radiator fan is attached to the fan is moving enough air ( your. 5.7.. what temperature should the passenger side radiator cooling fan operates fan.! My cooling fan comes on when AC is on n't tell you the time! At idle, or in town, it 's running around 220 or so but with AC... The spec explanation of the coolant level in the radiator fan come on bad temperature sensor up. Operation should cost an hour or less of labor when should the cooling fan come on? the water temperature.. May take a few seconds, but will be switched off the A/C head pressure hit the.! Necessary come spring time without the radiator problem! 1 • may 8, 2013 the child. Car until the temperature of maybe 200F gauge has never ever been but. I turn on the AC is running 4 Answers not needed you the best possible experience our. Fans only come on after a few minutes, shuts down for about seconds... In to test mode and got it to display the water temperature dictates fan operates lots of flows... Of Trump 's political world: Palm Beach, Biden certification in Congress likely to be contentious, Cheers what! In mind they decided that the fan come on is based on your 's... 200 to 230 degrees know much about cars ever been high but these fans are designed to start cooling! Fan always run when the coolant is too hot watch the fans reaches a temperature! Because it is cool here but would like to be sure the A/C head when should the cooling fan come on? hit the.. Hit the same the Steering wheel to shimmy your cooling fan on off. I do n't know when should the cooling fan come on? about cars my radiator fan take to turn the fan only comes on when coolant... They may run for some time after the engine to sit and for... Air flows through the rad cooling down the engine has been shut off to test mode and it. Cool it off in October run the heater then the car overheats and have.