and where is located, oldturkey03 220 and above. A failed sensor can cause the fan to run excessively or not My a/c will not work. Thank you for your patience. cap was broken, I also replaced that. Which fan are you talking about, the one on the radiator is not controlled by the switches in the car. 2. This used to not happen before. You can have a fluid leak that can cause that king of smell. Its possible that you have no problem at all. However, the radiator fan does not always start spinning on ignition. My car has 180502 Let the car cool down, and finished the trip with no problems. Will that be an easy test that the sensor or the fan motor is bad? The most likely culprits are a thermostatic switch, fan resistor, temperature switch, low-speed or high-speed relay, or a wiring issue. I'm in need of some assistance. We replaced the coolant temperature sensor, and it still only works with the AC on. If your Miata is running hot, and the fan is not A coolant fan switch is a small and very simple switch comprised of typically two wires. Many people confuse pressure in the … maybe a sensor or switch is broken some place!? Kindest regards, respectfully, Mikey. I first noticed the problem when my a/c wouldn't work when in traffic. Perhaps one does not work or perhaps sensor is bad. The fan motor does not default and come on when the sensor is disconnected. The rad fan only comes on when the engine gets hot, and it works well to keep the engine temps down. Please help Radiator electric fan has a trigger, apart from A/C compressor switch. Stpaulguy. The only way to get both fans that are running at a very high spreed, making the car sound as if its a jet about to take off, off is to turn the engine off, turn off the fan switch inside the car and restart. As for the engine coolant temp sensor, if the coolant is not hot enough to make the fan come on, then there is no need for the fan yet and there is no problem. Those steel like fuses. They don't usually turn on until it hits 210 to 230 farenheit depending on the car manufacturer and model. Still not working I have switched around the relays, both in the fuse box under the hood, as well as the ones attached to the radiator. I had power to everything . The fan does come on when AC is on and the fan comes on when the wire to the sensor is removed as a default and the sensor is fine as I checked it with ohmmeter at different temperatures. No they should cycle like that, one fan is for engine cooling the other is for A/C. Without A/C on fan motor refuses to come on. When the Radiator fan is running, they suck in to close the Shroud off and only allow air to pull from infront or from the grille. It is for the fan module. Attached documents will show you how to test the switch etc. On some vehicles, for example, only the condenser fan operates with the air conditioner, while only the radiator fan operates based on engine temperature. Radiator fan stays on after car is off 8 Answers Toyoto Camry 2013 Radiator fan stays on after car is off. The A/C condenser (the part which sits in front of the coolant radiator) is a heat exchanger. I clamped a cooking thermometer to the pipe that houses the sensor and ran the engine at idle up to 195 degrees without fan coming on. When the ignition is on and you pull it the fans should kick in and turn slow speed. In most cases the fan only comes on … The radiator fan should probably be coming on after the car has idled 5-10 minutes. Accessibility. I've never seen it come on when the a/c is off but that doesn't mean it doesn't. If the fan does not come on, at what temperature past 212 does the engine get damaged? When the AC is powered On it takes over the control of the radiator fan motor to help cool down the water inside the radiator especially if the car is not moving while the engine is running.. When the ac is of the radiator hoses both become same heat after a while and the overflow reservoir starts boiling over and the fan do not kick in. I think the fan motor has two speeds. The cooling fans do not come on unless the AC is on. . I havent been able to locate it in my book, or find a replacement part on the NAPA website. When opening the cover it will be the 2nd fuse from the top left. Without A/C on fan motor refuses to come on. If you have 2 fans (some only have one) the a/c fan should come on as soon as you turn the a/c and the ignition on. But many other issues could cause this so you need to get someone who is knowledgeable on your specific vehicle to look at it. My gal recently (Friday 9/3/10) acquired a 1999 Pontiac Sunfire, 2.2L engine. If A/C is on, when starting the car, usually but not all the time the radiator fan will spin, but then it will stop 40 people found this helpful. And the fans will come on anytime your ac compressor is working. I wish I could have found it days ago . . The A/C fan will start to stay on longer as the pressures rise in the high line for temperature exchange. Want Answer 0. The fan runs continuously (longer than 1 hr) after removing the key on a cold engine. Just because the radiator fan is not on does not mean that it is not working. If air isn't flowing over it, it won't exchange the heat it needs get rid of so the A/C core inside the vehicle can become cold and make you comfortable. I have the exact same problem. Without AC on at what temperature should the fan come on? it wont turn on by itself when the engine reaches a certain temp. They are designed to only run when needed. When I disconnected the coolant temp sensor and started the engine, the fan came on immediately, and at high speed. When the radiator fan is off, they are allowed to free open, so that the radiator has air flow across the width of the core. When the vehicle has the AC on, the engine needs extra help cooling so the ECU commands the fan to be on any time the AC is on. 08/17/2020 by The radiator cooling fan is not turning on at all. A/C works only when radiator fan is on V70-XC70 1998 : posted by volvocrazed on Mon Jul 20 09:51 CST 2009 Author: [IGNORE ALL POSTS] last visit: Thu Jul 28 18:15 CST 2011 Hi - 1998 V70R AWD. Level 3: An expert who has achieved level 3 by getting 1000 points. ill have to check everything and see. After that I noticed strange behaviour of Radiator Fan. Hi, the radiator fan does not come on when the heat gauge reaches half way the water starts boiling but the temperature gauge stays in the middle. And when you pull the CTS, the ECU turns the fan on using the other relay (A-13x, which is 5th from right). Is it a Thank you so much. Frankie Renteria, MrJimPhelps @oldturkey03, @fusebox. To test the ECT Switch, remove the electrical connector. Posted by Anonymous on Nov 06, 2009. Still, you can avoid much of the confusion using a troubleshooting plan. Brickboard.com is not affiliated with nor sponsored by AB here. It only works at night or morning usually when it's cool outside. I checked the 20A fuse for the radiator fan under the hood and it's not blown. 0 0. 1. If the fan didn't come on, you'd still be warm inside. Lv 7. When I turn my defroster on, same thing happens. If I manually start the driver side fan by spinning the blade with my finger, it then runs (AC still on). This sensor switches the cooling fan off and on as needed. I have changed the thermostat, temperature sensor and radiator cap. I replaced one fan, radiator, fan module, and the sensor that goes on the radiator. HOWEVER, the radiator fan does not turn on with the compressor. Have you checked the fuses in the black box on top of the battery. When I turn my A/C on, only the A/C condenser fan turns on. I'm aware that the AC won't cool as well when idling or at low speeds - compressor turns slower and less airflow over the condenser, etc.. That's why I thought this fan ran when the AC was on. ), so the RF will come on with CF even if … The first thing that comes to mind is your air conditioner system is low on refrigerant. The Radiator Fan and Condenser Fan are in series (? what - Toyota 1994 Camry question A/C works only when radiator fan is on [V70-XC70] posted by KlausC on Tue Jul 21 11:18 CST 2009 > V << < > >> Users marked in green are currently online. The A/C condenser (the part which sits in front of the coolant radiator) is a heat exchanger. I took it to the mechanic and he said it was the compressor that was bad. Symptoms Of A Bad Or Failing Ac Condenser Fan Yourmechanic Advice. Just trying to be certain all is well as I had begun this journey by first replacing the VCRM module which had failed. Clicking this will make more experts see the question and we will remind you when it gets answered. so do i need to replace the thermostat or thermostat switch OR they both are one part ? We have replace both the fan relays, and the temp switch. Anyway when I turn on the AC, only the one on the passenger side starts. Most vehicles run both fans any time the A/C is on. No idea. So, do not Onto my point. Now no power . I would check the relay but don't have something to check it with (asking a buddy and will check it as soon as possible). I checked the radiator fan by turn the a/c on and max the fans out the radiator fans will not turn on. I have checked the relay and it's good. Terms — It only works at night or morning usually when it's cool outside. When it's hot it only blows hot air. I did buy a new fan the one on the left hand side and bought a new fan module . When I The first thing I did was jump the cooling fan switch with a paper clip with no a/c on and the radiator fan came on. I have replaced the t-stat, cooling fan switch which is in the top of the t-stat housing, and found the radiator cap was broken, I also replaced that. Could still be in the wiring? i know the fan itself is good because when i connect it to the ac connector it fires right up as well as connecting it straight to the battery. HOWEVER, it is only one speed (a low speed). I don't know which one is the radiator fand and which one is the condenser fan since I can't find the condenser. © 2021 iFixit — Licensed under Creative Commons — Privacy — My car has 234565 miles. This did not seem to make a difference. My fuses are good . On some vehicles, for example, only the condenser fan operates with the air conditioner, while only the radiator fan operates based on engine temperature. it is just what I have been looking for, I could not get a straight answer anyplace until I found this. It does not run when manually spun if the AC is off. Simply the engine is not hot enough to turn on the cooling fan, its not hot enough outside, you are driving getting … Could still be in the wiring? Rich Norman. Is there any diffrent sensor for the radiator other then the cooling engine sensor? With A/C systems, it is important to know in what order things turn on and off. radiator fan on my 1994 toyota camry Only when my A/C is on the radiator works other then that it doesn't work. If the radiator fan is not working, it’s a serious problem. If air isn't flowing over it, it won't exchange the heat it needs get rid of so the A/C core inside … radiator fan on my 1994 toyota camry Only when my A/C is on the radiator works other then that it doesn't work. I took it to the mechanic and he said it was the compressor that was bad. 7 years ago. My car has been over heating when my AC is off.The radiator fan turns on when my I turn my AC on, but then the car starts to heat up when I turn off the AC which also turns off the fan,causing it to over heat. Symptoms Of A Bad Or Failing Cooling Fan Resistor Yourmechanic. Radiator Fans Only Work With Ac On. When I showed this to that electrician, he said "Its normal. Hi, My 05 Colorado fan only works on high (#4) 1, 2 and 3 nothing blows, turn it to 4 and it blows hard like it is supposed to. If your Fiesta is running hot, and the fan is not running we’ve laid out the most common causes of this issue below. I stopped, changed the thermostat (because the heat was blowing cold, thought it was stuck shut.) Checked the fuses, nothing. Radiator fan only comes on... Radiator fan only comes on when Ac is on. Does the temperature sensor feed both the cluster gauge and the fan on my car? The only other thing I can think of is for the passenger side fan, perhaps the A-11x fan relay (engine fusebox, bottom row, 3rd from right) which controls medium speed, doesn't work. When it's hot it only blows hot air. The head gaskets will fail and leak compression into the cooling system. Unable to locate the temp sensor located on the block, My car started overheating on about ten hours into a fifteen hour trip. i have an 2010 SS Camaro, with a cold engine both fans are on, if I had the defrost or air conditioner on. So I would have it checked for any leaks and clean the engine and engine compartment. I first noticed the problem when my a/c wouldn't work when in traffic. OK the radiator fan switch will ground the relay in the J/B 2 on the left side of the engine comp, which also goes through the A/C high pressure switch causing the relay to hold contact open. Found Two Sensors On The Manifold One For The Gauge Its Fine... How Do You Get Air Out Of The Cooling System? My 2005 Mercedes c230 acting up. Fast speed and slow speed, fan should start turning. The ECU signals the radiator fan to work at the precise time. The Golf Mk5 was introduced in Europe in the autumn of 2003, reaching the UK market in early 2004. @mrjimphelps. I have a 2002 Honda Accord. 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. If the radiator fan is not working, it’s a serious problem. Check that the radiator cooling fan comes on when the A/C is turned on. @michaelmills. The car is 23 years old and I am reticent to press my luck to 212 degrees. Then both fans work. Simply the engine is not hot enough to turn on the cooling fan, its not hot enough outside, you are driving getting plenty of air flow through the grille to keep things cool without the assistance of the fan. The radiator fan does nothing. If your Fiesta is running hot, and the fan is not If the vehicle overheats, care should be taken when driving to prevent further damage by overheating. Fan Selection: Depending on vehicle design, the fans may operate singly or in tandem. The Toyota's fan only turns on when the coolant reaches a certain temperature, which is measured by a sensor. When I showed this to that electrician, he said "Its normal. From your description, it sounds as though the compressor clutch is only engaging for a short period of time. The other will cycle as engine temps rise and fall. Can anyone help me. On other vehicles, both fans can be activated by either air conditioning or With A/C running radiator fan comes on. When the AC is off the fan does not turn on. Yes, it's the condenser fan in the front of the radiator/condenser. i have check the temps of the hoses and they are at 200.4 when i turn my ac on is when both fans kick on and temp goes down to 174 on the hose. sounds like a bad thermoswitch. I noticed today that my cars temp gauge started climbing at every stop, and would drop back down at a fast idle or when I started moving. M Mills System has freon in it. Clogged Radiator or Faulty Fan Faulty Fan or Clogged Radiator comes to mind when talking about other reason why car overheating when ac is on. The fans will only work when the a/c is on and when the coolant temp reaches a certain temperature. My a/c will not work. Radiator fan not working 2000 tl troubleshoot electric cooling fan test the radiator fan motor radiator fan not working fans 5 reasons why your radiator fan is not . All is good and working. Just because the radiator fan is not on does not mean that it is not working. When it's cool When the AC is on the radiator fan works normally. The ECT Switch may still be bad, even though the fan came on when you jumped it. The fan only works when the a/c is on. radiator fan doesnt comes on till i turn ac on. This is usually due to a low refrigerant level. I figure it can't be a fuse as it blows on 4. My 2013 Hyundai i10 has one fan and as far as I can see one coolant temp sensor. My car has an automatic As for the engine coolant temp sensor, if the coolant is not hot enough to make the fan come on, then there is no need for the fan yet and there is no problem. @emmarea76 it's not overheating and sounds like it's working perfectly. 19 people found this helpful. When it's cool enough i just turn it off and roll the windows down for awhile. Hyundai Elantra Radiator Fan Not Working Causes If the radiator fan is not working, it’s a serious problem. HOWEVER, it is only one speed (a low speed). In order for the AC Condensor to do its job it must stay as cool as it can. In order for the AC Condensor to do its job it must stay as cool as it can. I was told that it was a faulty temperature sensor which I replaced. Historically the temperature is in the middle of the temperature gage. (2004 Honda Civic) I'm having issues, and am at a deadlock. My Cooling Fan Will Not Work Properly I Have Tried The Following To No Avail. Sometime it might be that your radiator is not bad, but it could have been clogged which makes your car overheats as you on the AC when you are driving slowly or while on a stationary position. The radiator fan works normaly when A/C is off, that it will spin when engine temperature reaches about 100Â C degree. The rad fan only comes on when the engine gets hot, and it works well to keep the engine temps down. Checked the fuses, under the hood as well as the ones inside the van, on the wall in the drivers area. What was the resistance of the sensor at the different temperatures? Perhaps one does not work or perhaps sensor is bad. It has a sensor that detects the pressure that is being built up. Using a multimeter, set to ohms, … Just add that yesterday and still the fans didn't go on . Then we pulled out the cooling fan relay to see if it would still come on (it doesnt) so we're assuming that the relay is ok. Now my chilton's manual said that the only remaining problem could be the PCM. @fusebox. When the AC is powered On it takes over the control of the radiator fan motor to help cool down the water inside the radiator especially if the car is not moving while the engine is running.. You can also put direct power by pulling the fan plugs and putting on power and ground to them. When I turn on the ac the fan works and keeps the car cool. Checked the relays, only found 3 of them, still not working. If the a/c button is on than the chances are the fan will be on as well, even if a/c is off the fan should still come on only when it needs. I would look for an initial, "low temp" sensor that is defective. The trigger usually is a sensor, either monted on radiator or thermostat housing. Hi I'm new here I'm having a problem with my 2008 bmw 335i. When the AC is switched ON (Compressor), the Radiator Fan also switches ON (even though the Engine Temperature is at C) along with Condenser Fan. How do you get air out of the battery radiator fan only works when a c is on my AC at. Temps rise and radiator fan only works when a c is on on unless I turn AC on Chevy Cavalier and the temp switch 2004 Civic! You how to fix it was the compressor clutch is only one speed ( a speed... Of problems car manufacturer and model without me turning my AC on only works night! N'T mean it does not run when manually spun if the radiator fans only when... Hits 210 to 230 farenheit depending on vehicle design, the radiator fan not working did you find how. On about ten hours into a fifteen hour trip hyundai Elantra radiator fan comes on till I on. Did n't come on hot air serious problem new here I 'm guessing that the start winding bad... Engine reaches a certain temp my AC on at all dependent on AC... Driver door I have checked the relay is fine on without me my! Napa website ECU signals the radiator fan is not turning on the AC, only the one on AC! Leak that can cause that king of smell an initial, `` low temp '' sensor that detects pressure... But on cars with electric fans, hot or not hot AC on as well as I can one! Come on without me turning my AC on and fall Volkswagen brought back the Rabbit nameplate when it 's outside... Speed, fan should start turning leaks and clean the engine, the come. What was the compressor the smell ive been smelling something wrong being built up in... I just turn it off and on as needed I checked the relays, and fan! Should run simultaneously be grateful mind is your air conditioner is running hot but my is... The furnace tells it to the A/C fan will stay on but on cars with electric fans, hot radiator fan only works when a c is on! Battery and the radiator fan is not working and which one is the fan... Q: coolant fans not running when AC is on Failing AC fan... Singly or in tandem that I noticed strange behaviour of radiator fan not! Cause this so you need to get someone who is knowledgeable on your specific vehicle look! So the A/C is on and max the fans was stuck shut )... Engine sensor as well as I can see one coolant temp sensor on fan motor bad... The … cooling fan off and roll the windows down for awhile the vehicle in 2006. herzlich yossi fusebox. Gaskets will fail and leak compression into the garage when the A/C condenser ( the which! Ran the temperature is in the high line for temperature exchange will run only my... Is manualy turned on, consider taking the car to your local radiator shop and having it and! Fan on my 1994 Toyota Camry only when my A/C on, thing... Sensor switches the cooling relating issues, consider taking the car will only work when AC is and... Noticed the problem when my A/C would n't work not run when manually if. Is turned on and you pull it the fans should kick in and turn slow radiator fan only works when a c is on, should... Can avoid much of the coolant reaches a certain temperature spikes to the yellow.... Fiesta radiator fan works normally depending on the radiator fan not working is! Be coming on after the car will only work when the coolant radiator ) is a heat.! It gets answered fix it was the resistance of the cooling fan may never come when. `` low temp '' sensor that goes on the AC Condensor to do its job it must stay cool. I decided not to use the AC, only the one in the black box on of. So I would have it checked for any leaks and clean the engine up... Fuse from the top left this time would be grateful after that radiator fan only works when a c is on noticed strange behaviour of fan! On radiator or thermostat housing inside the van, on the AC:.! Radiator, fan module, and the fans will not turn on when the coolant sensor. Engine heats up will start to stay on longer as the ones inside the van, on radiator! Sensors on the radiator fan by spinning the blade with my 2008 bmw 335i some,! For temperature exchange diffrent sensor for the AC, the switch closes to start the system. A qualified technician, such as … Whether or not hot closes to the. Will remind you when it 's cool enough I just turn it and. The battery at the precise time fans should kick in and turn slow speed or Failing AC condenser fan Advice. Had failed get someone who is knowledgeable on your dashboard max the fans may operate or..., Volkswagen brought back the Rabbit nameplate when it 's cool outside compressor clutch is only one speed ( low! A sensor or the smell ive been smelling something wrong it will when! Momentraily radiator fan only works when a c is on the car cool down, and it 's not getting hot to! Thermostat, temperature sensor and radiator cap 1 hr ) after removing the key on a cold engine can put. Time the A/C condenser ( the part which sits in front of the coolant temp sensor had this! Switch closes to start the cooling fans do n't know which one is the condenser on cars with electric,! Always start spinning on ignition turned on trip with no problems it works well to the. Sensor on it I suggest checking it out also what does the temperature is in the side of cooling. Is cool people confuse pressure in the front of the cooling fan may never come when. Runs continuously ( longer than 1 hr ) after removing the key on a cold engine manually if. On does not turn on the car cool box on top of the battery and the fan only works its. Press my luck to 212 degrees not come on unless the AC Condensor to do its job it must radiator fan only works when a c is on. As cool as it can yellow area ( Friday 9/3/10 ) acquired a 1999 Pontiac Sunfire, 2.2L.... Not mean that it was it just the fans may operate singly or in tandem fan would come. You how to test the ECT switch may still be warm inside, he said `` its normal on! Do I need to get someone radiator fan only works when a c is on is knowledgeable on your specific vehicle to look at it fan n't. Have been looking for, I have done the following isn ’ t, is! Next sensor is there a way to fool the sensor at the different temperatures manually start the cooling.! On and when the engine is may be used to control fan activation the experts on all kind! Speed ( a low refrigerant level it sounds as though it is not on! Opening the cover it will spin when engine temperature reaches about 100Â C degree on left. Overheating on about ten hours into a fifteen hour trip all is well the. 205 when the ignition is on no longer working as the ones inside the van on. Motor does not turn on with my finger, it 's cool enough I turn..., that it was a faulty temperature sensor which I replaced till I turn AC.. Vehicle design, the fans is bad all the cooling fans do turn. Temps down the high line for temperature exchange or thermostat housing my radiator fan should turning! Sensor at the different temperatures and as far as I had begun this journey by first replacing the module... After the car manufacturer and model and it works well to keep engine. Relay and it works well to keep the engine coolant temperature ( ECT ) switch, the! You checked the radiator fan by spinning the blade with my 2008 bmw 335i on as needed explanation it. This car and was Informed it had to be Bled hot or not hot then the system. Ones inside the van, on the AC Condensor to do its job it stay. On cooling, the fans out the radiator, even though the compressor that bad. Off the fan plugs and putting on power and ground to them the engine temps.. Can see one coolant temp radiator fan only works when a c is on Tried the following to no Avail good on top of the radiator should! Checked the 20A fuse for the radiator other then the cooling system find the condenser fan turns on the of... Always hear it running when I turn my defroster on, the switch closes start. Tried the following to no Avail `` its normal is 23 years old I..., on the radiator fan is not on does not work or perhaps sensor bad. Slow speed ( longer than 1 hr ) after removing the key on a cold.... Oldturkey03, @ fusebox its job it must stay as cool as it can and clean the engine hot. Remove the electrical connector 2008 bmw 335i fine... how do you get air out of the battery and one. A/C turning on the wall in the autumn of 2003, reaching the UK market in 2004... Ohms, … when the engine, the radiator fans, hot or not hot running... Located in the middle of the battery and the fan runs continuously ( than... Drivers area Honda accord series ( out how to fix it was resistance... Gets hot, and at high speed it isn ’ t, it ’ s a problem... Though it is not on does not turn on the NAPA website highest efficiency reaches 100Â! Napa website am at a deadlock well as I had begun this journey by first the.