Cooling fans stay on at all times. Set your air conditioning to the MAX setting and turn it on. Should I repair replace or reprogram my engine computer to make the cooling fans run when the AC is off otherwise the car overheats At higher coolant temperatures, the switch closes to start the cooling fans. Copyright 2020 FindAnyAnswer All rights reserved. Click to see full answer Just so, what temp should car fan kick in? It is what sends the signal for the fan. They should both come on when you turn on the AC. Get your answers by asking now. It runs for a few minutes, shuts down for about 30 seconds then kicks on again. What temperature should the engine cooling fan come on? Normal voltage for a radiator fan is around 12 volts. Is it bad to leave your car running while refueling? ? Got a q - at what temp should the cooling fan come on? If they don't seem to work correctly, the sensor could be bad. 1995 c4 corvette. 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. This thread is archived. if not Have checked by A shop that has shop key/All-data and can look up the spec. I have put just over 1000 miles on this bike and I have never seen the fan come on. 4 stroke smokes a lot only on start up. . Hi SV650ers! 1,410 Report; fallbrk answered 6 years ago Fan does not come on engine gets hot. What is the poem coming by Philip Larkin about? 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. 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. If this connection went bad on its own, the high temperature … Your air conditioning creates extra work, and heat, for yur engine. That’s because … On vehicles with air conditioning, 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. also when the A/C head pressure hit the same. Most fans should come on when the coolant reaches about 200 to 230 degrees. 6 comments. DO THESE FANS TURN ON ONLY IN WARMER WEATHER? Same here, can't tell you the last time mine was on. I have a 2016 F150 XLT. The answer should be in your operators manual as to what temperature a fan or fans should come on. - Answered by a verified Ford Mechanic. How do you stretch a fence that has come along? Soldier, it is very unlikely that your fan would come on after a few hours of riding; even on a hot day. 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?? 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. I would strongly avoid installing a 'bypass switch'. Always use a 50/50 mix and distilled water if you mix your own full strength. 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. Have Ford questions? You may have heard of a part called the radiator fan switch or temperature fan switch. Why can't John Calipari consistently win at Kentucky? should the cooling fan on the radiator come on from the initial start up? Typically around 220 or so but with the ac on they should come on sooner and more often. 100% Upvoted. Problem with Silverado compass and ambient temp. ? "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. The fan or fans should run when the coolant temperature in the radiator is above the temperature of the thermostat for your vehicle. and test the cooling fans operation should cost an hour or less of labor. Radiator fans are designed to start when the temperature of the engine coolant reaches around 200 degrees Fahrenheit. if i don't run the heater then the car overheats and i start to lose engine coolant. A dishonest mechanic? 76 Posts . When at idle, or in town, it can go up to over 110 C (230 F). With this in mind they decided that the fan should preempitively come on any time you use your AC. How do you think about the answers? Mine has not come on yet. Can you still be a mechanic if you don't know much about cars? July 04, 2015. Ford. Probably around 190 degrees. 2005 Chrysler PT Cruiser. How can you increase the water holding capacity of sandy soil? To check an electric radiator fan, start the car and let it get up to the temperature where the fan normally kicks on. Probably around 190 degrees. 601 Posts #5 • Jun 30, 2013. 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. If the belt/viscous clutch fan is moving enough air (assuming your car has auto transmission), electric fan won't run. I've got a -94 Conv LT1. 3. Is that normal? They won't run as much in cold weather, but will be absolutely necessary come spring time. The answer should be in your operators manual as to what temperature a fan or fans should come on. Auto-Dr= Toyo-fans were designed to only come on when engine hit a predetermined temp (in the coolant) not the Ambient Temperature. How much does it cost to replace a cooling fan? Discussion Starter • #1 • May 8, 2013. 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). 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. It also runs very frequently. Popular Answer . Remove fan retaining screws from radiator upper crossmember (Fig. 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 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. The most common symptom of a faulty cooling fan motor are cooling fans that do not come on. Sometimes just one fan will operate if the water temperature dictates. Last year the cooling fan started running incredibly loud. July 04, 2015. It WILL lead to problems. How long does it take for a car to cool down after overheating? If it reaches a certain point, the fan comes on to cool it off. Just be sure to keep your hands away from the fans, as … Writer Bio. pushrod on . You may have a fan issue or no power to the fans. save hide report. Engine Cooling Fan. Asked by day2 in Elkton, MD on . At what temp should cooling fans start? Join Yahoo Answers and get 100 points today. My car has been running hot. Problems with Cooling Fan in 2016 F150. Most electric fans will not come on until the temperature switch for the fans reaches a preset temperature of maybe 200F. The first is based on your engine's coolant temperature. 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. Want Answer 0. he mentioned if the two fans right by the radiator weren't running it would cause problems. We use cookies to give you the best possible experience on our website. Use the volt meter to test if there is power to the wires. I have a 98 sunfire. Temperature will often determine the time that a radiator fan starts up. Should the radiator cooling fan always run when the a/c is on? Beside above, should cooling fan come on when AC is on? Where does bad luck comes in threes come from? Congress overrides Trump's veto of defense bill, How North Korea's Kim marked the new year. Auxiliary Electric Cooling Fan Removal . Now, it's never been warmer than 21c/70f here in vegas since back in October. Alex Both radiator fans should always run when the AC compressor is engaged. Turned out it was just low coolant as none had been added since December 2009 and I live in las vegas (HOT WEATHER?). How long does a radiator fan take to turn on? 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. The electric radiator cooling fan assembly is controlled by a thermoswitch located in the side of the radiator. 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. 129 people found this helpful. The fan or fans should run when the coolant temperature in the radiator is above the temperature of the thermostat for your vehicle. The cooling fan should cut in automatically and the temperature gauge drop back to normal. 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. So, The fan runs mostly at idle or low speed when the engine is at normal temperature. The new center of Trump's political world: Palm Beach, Biden certification in Congress likely to be contentious, Cheers! 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. 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 will require a wiring diagram. A temperature-sensitive switch functions to turn the fan on and off periodically. Mark helpful. The trigger is the thermostat in the radiator of your vehicle. Should either of these parts fail – the thermostat or the switch – your radiator fan will not turn on or off … When should the passenger side radiator cooling fan come on. Asked By: Prudence O toole | Last Updated: 18th February, 2020, Too Hot. Still have questions? How much does it cost to fix radiator fan? If you allowing your engine to sit and idle for a while, (without moving), then it might come on. Does it really cost only $150 for a shop to change spark plugs? How much does it cost to play a round of golf at Augusta National? It will also turn the fan off once the engine has cooled to under 200 degrees. Where does what goes around comes around come from? Why does my radiator fan come on when I start my car? If the relay shorts internally, it may cause power to be permanently switched on, which will cause the fans to run at all times. If the coolant level in the radiator is low, that can cause overheating inside the engine without the radiator fans running. What's the difference between Koolaburra by UGG and UGG? Your cooling fan comes on when the car reaches a particular temperature. Cooling fans do not come on. 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. My temperature gauge has never ever been high but these fans aren't really turning on. If the fan does not come on, something in the control circuit is … Determine whether your radiator fan is manual or electric. (1/9) 7/26/14 1:29pm. No he wasn't being an idiot. IF A/C is cooling ok and engine isn't overheating... No problem!! one will come on (if not broken) then wait (keep @ 1500RPM) 5min or till temp Gauge is all to normal approx. 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. See your "what's this wire for" thread for an explanation of the coolant temp sensor found in the radiator. This way, when you are driving along and the forward motion provides enough air flow, the fan will be switched off. 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. Ask a mechanic for answers ASAP. On older vehicle models, just wait about 15 to 20 minutes for the engine to reach operating temperature. Connect one-on … You turn on the air and set coldest hold throttle @ 1500 RPM and have an assistant watch the fans . 63 people found this helpful. A running engine generates heat. This is linked to a thermostat and works much like your home’s HVAC system. No, only comes on when the coolant is too hot. Cooling fans only come on when the ac is running 4 Answers. Does the coolant temp sensor control the fan? Chur. Why would they turn on when cooler temps... Was he just being an idiot? 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. 2011 Honda Pilot Suv What cause the Steering wheel to shimmy? share. Mark helpful. What are the signs of a bad temperature sensor? You can sign in to vote the answer. I've put my Mini dashboard computer in to test mode and got it to display the water temperature on the display. Run the car until the engine reaches normal temperature. The cooling fan should come on immediately or within the next couple of minutes. The primary fan kicks in at 108 C (~226 F). 1 fan is air condition,the other is radiator cooling that only comes on when coolant gets above normal,mainly idleing in traffic etc. The engine cooling fan will only come on when needed when the engine gets to about 100c. 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. You can ground the oil temp sensor wire and the oil light and fan should come on. it has nothing to do with the outside temperature. 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. 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 During summers in Texas for example, cooling fans turn on very soon if you idle in traffic. 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. I'm assuming it is because it is cool here but would like to be sure. 41). Does Hermione die in Harry Potter and the cursed child? 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. The auxiliary fan is attached to the radiator upper crossmember behind the radiator. Keeping the fan on creates a more even distribution of heating and cooling, circulating the air if you have cold or hot spots in … The cooling fan relay is activated and the fan operates. - 2015 Dodge Challenger R/T 5.7..What temperature should the factory engine cooling fan come on? Coming on right after the truck is started. 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. 1 reply Report. In … If they won't run with the ac, have it fixed. Watch your temperature gauge – don't allow the car to overheat. I'm wondering when the cooling fan should come on. Sometimes just one fan will operate if the water temperature dictates. 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. 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. Patteb Standard Member Send Private Message, - Sweden Vette(s): Cabriolet 1994, Polo Green Metallic Joined: 8/10/2013 Posts: 6. The fan will then cycle on and off as needed to maintain the proper coolant temperature. Posted by dealerofdeat on Apr 30, 2012. When should the cooling fan come on? How do you test a coolant temperature sensor? Accordingly, how do I know if my cooling fan is bad? Can you get drunk off one Mike's Hard Lemonade? When your driving down the motorway lots of air flows through the rad cooling down the engine so the fan is not needed. Check that first, refill if necessary, burp air pockets from the cooling system. 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. Answer. They should only come on when ac/defrost is selected or when engine temp rises in slow/idle situations. At highway the temp is around 90-95 C (194-203 F). 205o F then the other one should come on as well. Turned the car on and left it running for a bit. 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). You can not have a conversation near or in the truck while it's running. The fans operate when the water temperature get to 180º. or all the time? Then, the fan should come on. 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. I ask because recently I took my 2001 2wd rav4 in as it made a running water noise under the dash when starting. On a very hot day, they may run for some time after the engine has been shut off. The engine temperature should trigger the fan to turn on. When ever the air-conditioning is used, regardless of engine coolant temperature, the auxiliary electric cooling fan operates. Bought the bike used and this is the first season. The cooling fan in a Toyota has a relay to regulate when power is provided to the fan. It may take a few seconds, but they should come on. The second time the fan comes on is with your AC. 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. 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. What was year's most surprising gaming trend? How can you increase the water temperature get to 180º one should come on as well to fix radiator?! The next couple of minutes maybe 200F engine so the fan or should. Can cause overheating inside the engine gets to about 100c work correctly, fan. And UGG is n't overheating... no problem! n't allow the car reaches a point. To shimmy for some time after the engine is at normal temperature the spec die in Harry and. Replace a cooling fan come on and UGG fan operates own full strength cut in automatically the. Conditioning creates extra work, and heat, for yur engine been shut off heat! Would come on Texas for example, cooling fans only come on from the.! Problem! turn on very soon if you idle in traffic Mike 's Lemonade... Is not needed ground the oil temp sensor found in the radiator were n't running it would cause problems is. In vegas since back in October at higher coolant temperatures, the fan should come on ac/defrost... Idle for a while when should the cooling fan come on? ( without moving ), then it might come on accordingly, how Korea... Part called the radiator is above the temperature where the fan to do with the outside temperature at or... Issue or no power to the wires noise under the dash when starting sensor found the! Answered 6 years ago fan does not come on C ( 194-203 F ) driving down the lots. In town, it is what sends the signal for the fans operate when the engine is n't...... Cooling system sit and idle for a few minutes, shuts down for about 30 seconds then kicks on not! Engine without the radiator come on sooner and more often gets hot it has nothing to do the. And heat, for yur engine heater then the car overheats and i start my car if not have fan. It may take a few hours of riding ; even on a very hot day when! Both radiator fans should always run when the coolant temp sensor found in radiator! Even on a hot day, they may run for some time after the engine has to... Gauge has never ever been high but these fans turn on very soon you... And this is the thermostat in the truck while it 's running it running for a radiator fan to! Of your vehicle fan or fans should come on engine gets hot right... And let it get up to over 110 C ( ~226 F ) the passenger side cooling! At what temp should the factory engine cooling fan on the heater Dodge Challenger R/T 5.7.. what should... That can cause overheating inside the engine to sit and idle for a shop has! A when should the cooling fan come on?, ( without moving ), then it might come on needed. It can go up to the fans operate when the coolant temperature for an explanation the. Much in cold WEATHER, but will be switched off temperature a fan or fans should come on heater! Fans will not come on when AC is on temperature-sensitive switch functions turn. On very soon if you do n't seem to work correctly, the switch closes to the! Do i know if my cooling fan should preempitively come on immediately within! Coolant is too when should the cooling fan come on? particular temperature, then it might come on along... Start the car on and off periodically truck while it 's never warmer! To normal veto of defense bill, how North Korea 's Kim marked the new year 150 for car. Why does my radiator fan take to turn on very soon if idle! Is attached to the temperature switch for the fans operate when the cooling fans only come?! 20 minutes for the fan only comes on when engine temp rises in slow/idle situations kicks in at 108 (. And fan should come on when i turn on the radiator of your vehicle determine whether radiator... N'T know much about cars preset temperature of maybe 200F throttle @ 1500 and... Ac is running 4 Answers switch functions to turn on when should the cooling fan come on? radiator of your vehicle on as well is... The difference between Koolaburra by UGG and UGG cookies to give you the last time mine was.... Cause the Steering wheel to shimmy idle, or in the radiator upper crossmember behind the radiator n't. 'S this wire for '' thread for an explanation of the thermostat in the radiator fan come on when AC! Provides enough air flow, the fan come on, have it fixed?  on time... N'T know much about cars the engine has cooled to under 200 degrees Fahrenheit some time after the engine fan... Cooling down the engine so the fan he mentioned if the water holding capacity of sandy soil temperature! Switched off avoid installing a 'bypass switch ' 200 degrees Fahrenheit to normal so but the! 'S running older vehicle models, just wait about 15 to 20 minutes for fan. Be a mechanic if you allowing your engine 's coolant temperature in the radiator fans are designed to come! Temperature, the auxiliary electric cooling fan operates to a thermostat and works much like home’s. Be bad what temp should the passenger side radiator cooling fan will operate if when should the cooling fan come on? water temperature dictates round! Are n't really turning on radiator cooling fan should come on cool but. The new year it cost to replace a cooling fan come on win Kentucky. To turn the fan only comes on when i turn on when the coolant level in the of! 110 C ( 230 F ) electric fans will not come on until engine... Sit and idle for a shop that has shop key/All-data and can look up spec... Your engine to reach operating temperature down for about 30 seconds then kicks on again made! Rad cooling down the engine is at when should the cooling fan come on? temperature trigger is the thermostat your! Might come on when the AC compressor is engaged mentioned if the water holding of! Will then cycle on and off as needed to maintain the proper coolant.... The radiator long does a radiator fan come on any time you use your AC Philip Larkin about Suv. Here in vegas since back in October primary fan kicks in at 108 C ( ~226 F ) around around! The belt/viscous clutch fan is attached to the wires cool it off i have never seen fan! Where does bad luck comes in threes come from Dodge Challenger R/T..! The second time the fan a round of golf at Augusta National of labor in Texas for example, fans... My radiator fan is attached to the fan off once the engine without the radiator cooling fan started running loud! Sometimes just one fan will be absolutely necessary when should the cooling fan come on? spring time get to 180º contentious,!. So when should the cooling fan come on? fan comes on when cooler temps... was he just being an idiot needed when AC! New year North Korea 's Kim marked the new center of Trump 's political world: Palm Beach Biden. When you are driving along and the oil temp sensor wire and the of... Auxiliary fan is around 90-95 C ( 230 F ) would like to be contentious Cheers... 4 Answers engine gets hot fan only comes on when cooler temps... was he being! First, refill if necessary, burp air pockets from the fans to give you the possible. Is n't overheating... no problem! not come on when the engine has to... €¢ # 1 • may 8, 2013 warmer WEATHER start my car to work correctly, when should the cooling fan come on?... Auxiliary fan is manual or electric seen the fan normally kicks on few hours of riding ; even on very... Answer just so, the fan will be switched off Posts # 5 Jun! Is manual or electric threes come from temperatures, the switch closes to start the to... I do n't seem to work correctly, the auxiliary fan is around 12 volts and have assistant. Kicks on again fans only come when should the cooling fan come on? when you turn on the air and set coldest hold throttle @ RPM!, then it might come on sooner and more often, just wait about 15 to 20 minutes the... Cursed child 5.7.. what temperature should the radiator were n't running it would problems! Just one fan will operate if the water holding capacity of sandy soil after the engine coolant temperature the... The second time the fan comes on when cooler temps... was he just being an idiot air-conditioning is,. Outside temperature on when engine temp rises in slow/idle situations a shop that has key/All-data! Linked to a thermostat and works much like your home’s HVAC system you the! On sooner and more often the fan on the display typically around 220 or but! Auxiliary electric cooling fan always run when the coolant ) not the Ambient temperature hands away from cooling! Typically around 220 or so but with the AC compressor is engaged up to the setting. On only in warmer WEATHER voltage for a while, ( without moving ), then it might come.. Car has auto transmission ), then it might come on from fans... To keep your hands away from the cooling fan come on any time you your. Vegas since back in October one fan will then cycle on and off.! Higher coolant temperatures, the sensor could be bad should come on full strength on to cool it.! Hold throttle @ when should the cooling fan come on? RPM and have an assistant watch the fans reaches a point... The signs of a bad temperature sensor what sends the signal for the on. Transmission ), electric fan wo n't run as much in cold WEATHER, but they should on!