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radiator fan only works when a c is on

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Will that be an easy test that the sensor or the fan motor is bad? 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. But many other issues could cause this so you need to get someone who is knowledgeable on your specific vehicle to look at it. it is just me or the smell ive been smelling something wrong? Out of all that I have read on internet about the problem I am having with this car and the days I have spent working on it I just found this information on my tablet. I've never seen it come on when the a/c is off but that doesn't mean it doesn't. and where is located, oldturkey03 cap was broken, I also replaced that. Jawwad Ayub. Q: Coolant fans not running when ac is turned on. It does not run when manually spun if the AC is off. sounds like a bad thermoswitch. HOWEVER, the radiator fan does not turn on with the compressor. it wont turn on by itself when the engine reaches a certain temp. I checked the radiator fan by turn the a/c on and max the fans out the radiator fans will not turn on. © 2021 iFixit — Licensed under Creative Commons — Privacy — Comment; Flag; More. I stopped, changed the thermostat (because the heat was blowing cold, thought it was stuck shut.) When the switch is unplugged the ground will go away and the relay will close, (normally closed relay), (normally closed switch). The fans will only work when the a/c is on and when the coolant temp reaches a certain temperature. I can turn the unit off inside the car with engine running, but this doesn’t turn the fans off at the motor, both fan are running at this time. 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. I have the exact same problem. Those steel like fuses. They are the experts on all these kind of problems. This did not seem to make a difference. 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.. 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. If the fan didn't come on, you'd still be warm inside. Lv 7. ill have to check everything and see. When it's cool enough i just turn it off and roll the windows down for awhile. The trigger usually is a sensor, either monted on radiator or thermostat housing. Unable to locate the temp sensor located on the block, I Am Trying To Bleed The Cooling System On This Car And Was Informed It Had To Be Bled. The relay is fine if it responds to the A/C turning on. The Toyota's fan only turns on when the coolant reaches a certain temperature, which is measured by a sensor. On other vehicles, both fans can be activated by either air conditioning or 0 0. Symptoms Of A Bad Or Failing Ac Condenser Fan Yourmechanic Advice. Joseph Macaluso. 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. radiator fan doesnt comes on till i turn ac on. Hello all! When I showed this to that electrician, he said "Its normal. Just because the radiator fan is not on does not mean that it is not working. We are still having the same problem, any advise at this time would be grateful. In order for the AC Condensor to do its job it must stay as cool as it can. Level 3: An expert who has achieved level 3 by getting 1000 points. Attached documents will show you how to test the switch etc. We replaced the coolant temperature sensor, and it still only works with the AC on. The electric radiator cooling fan assembly is controlled by a thermoswitch located in the side of the radiator. A qualified technician, such as … They don't usually turn on until it hits 210 to 230 farenheit depending on the car manufacturer and model. I checked the radiator fan by turn the a/c on and max the fans out the radiator fans will not turn on. 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. I had power to everything . Cooling fan only works when ac is on - 2002 Ford Mustang. 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 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. 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. Could still be in the wiring? 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.. I have a 1998 Chevy Cavalier and the radiator fan does not turn on when the engine heats up. The A/C fan will stay on but on cars with electric fans, the fan might turn off momentraily while the car is cool. On some vehicles, for example, only the condenser fan operates with the air conditioner, while only the radiator fan operates based on engine temperature. I'm in need of some assistance. If your Fiesta is running hot, and the fan is not running we’ve laid out the most common causes of this issue below. It was working find but now nothin7. When I showed this to that electrician, he said "Its normal. The first thing that comes to mind is your air conditioner system is low on refrigerant. No they should cycle like that, one fan is for engine cooling the other is for A/C. 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. Fast speed and slow speed, fan should start turning. 19 people found this helpful. Check/replace the Engine Coolant Temperature (ECT) Switch, not the ECT Sensor. I have checked the relay and it's good. But it's not getting hot enough to turn on the fans. 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. If the vehicle overheats, care should be taken when driving to prevent further damage by overheating. maybe a sensor or switch is broken some place!? Then when you turn the A/C on, the temperature goes up even higher, which triggers the next sensor. The ECT Switch may still be bad, even though the fan came on when you jumped it. Rich Norman. 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. Thank you for your time and knowledge and willingness to share both. With A/C running radiator fan comes on. This is usually due to a low refrigerant level. Hyundai Elantra Radiator Fan Not Working Causes They are designed to only run when needed. 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. 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. Yes the fuses are good on top of the battery and the one on the side driver door I have test the fans . I figure it can't be a fuse as it blows on 4. When the AC is on the radiator fan works normally. It may sound like a funny question, but some of the cars I have use one fan for when the water gets hot, and another fan for when AC is on. 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. I have a 90 accord DX and the radiator fan only comes on when the A/C is on, and the condenser fan never comes on. Many people confuse pressure in the … The A/C condenser (the part which sits in front of the coolant radiator) is a heat exchanger. Is there any diffrent sensor for the radiator other then the cooling engine sensor? The radiator fan should probably be coming on after the car has idled 5-10 minutes. 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 . You can have a fluid leak that can cause that king of smell. Most vehicles run both fans any time the A/C is on. My car has 234565 miles. Given all the cooling relating issues, consider taking the car to your local radiator shop and having it diagnosed and fixed there. 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 most likely culprits are a thermostatic switch, fan resistor, temperature switch, low-speed or high-speed relay, or a wiring issue. If the fan does not come on, at what temperature past 212 does the engine get damaged? I bit the bullet and ran the temperature up to 205 when the fan came on. I took it to the mechanic and he said it was the compressor that was bad. @oldturkey03, @fusebox. In a nutshell: The radiator fan comes on so the A/C works at its highest efficiency. Accessibility. System has freon in it. The head gaskets will fail and leak compression into the cooling system. Checked the fuses, under the hood as well as the ones inside the van, on the wall in the drivers area. 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). If the radiator fan is not working, it’s a serious problem. Yes, it's the condenser fan in the front of the radiator/condenser. Just because the radiator fan is not on does not mean that it is not working. radiator fan on my 1994 toyota camry Only when my A/C is on the radiator works other then that it doesn't work. Without A/C on fan motor refuses to come on. Hi fellas, Glad i stumbled onto this great forum. (2004 Honda Civic) I'm having issues, and am at a deadlock. 220 and above. In North America, Volkswagen brought back the Rabbit nameplate when it introduced the vehicle in 2006. herzlich yossi If the radiator fan is not working, it’s a serious problem. I've never seen it come on when the a/c is off but that doesn't mean it doesn't. My a/c will not work. 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. The cooling fan may never come on, depending how hot the engine is. 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. 2 Answers. Cooling fan problems can be hard to diagnose, depending on your vehicle model and the type of failure. My car started overheating on about ten hours into a fifteen hour trip. Please help Radiator electric fan has a trigger, apart from A/C compressor switch. radiator fan on my 1994 toyota camry Only when my A/C is on the radiator works other then that it doesn't work. My gal recently (Friday 9/3/10) acquired a 1999 Pontiac Sunfire, 2.2L engine. When I turn on the ac the fan works and keeps the car cool. I think the fan motor has two speeds. 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. Still the problem persists. It is for the fan module. More specifically, the radiator fan is no longer working. On some vehicles, for example, only the condenser fan operates with the air conditioner, while only the radiator fan operates based on engine temperature. 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. If your Miata is running hot, and the fan is not Here is the explanation why it comes on with the AC:". Want Answer 0. 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. I replaced one fan, radiator, fan module, and the sensor that goes on the radiator. 1. 7 years ago. 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. If I jumper both leads going to sensor should the fan come on? If the radiator fan is not working, it’s a serious problem. HOWEVER, the radiator fan does not turn on with the compressor. If you want to manually turn on the fan, you need to wire part of the fan relay to "Ground" for it to turn on. I checked the 20A fuse for the radiator fan under the hood and it's not blown. The fan runs continuously (longer than 1 hr) after removing the key on a cold engine. If the radiator fan is not working, it’s a serious problem. Perhaps one does not work or perhaps sensor is bad. Found Two Sensors On The Manifold One For The Gauge Its Fine... How Do You Get Air Out Of The Cooling System? On vehicles with air conditioning, rising refrigerant pressures will also activate the cooling fans. If it is the one on the radiator, then it could be a fuse, relay, temp sensor or water level in the cooling system. 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. Frankie Renteria, MrJimPhelps The radiator fan works normaly when A/C is off, that it will spin when engine temperature reaches about 100Â C degree. So I would have it checked for any leaks and clean the engine and engine compartment. Pros. From your description, it sounds as though the compressor clutch is only engaging for a short period of time. This sensor switches the cooling fan off and on as needed. If I manually start the driver side fan by spinning the blade with my finger, it then runs (AC still on). My car has 180502 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. Turning on the AC automatically turns on the radiator fans, hot or not hot. Brickboard.com is not affiliated with nor sponsored by AB here. If your Fiesta is running hot, and the fan is not what - Toyota 1994 Camry question And when you pull the CTS, the ECU turns the fan on using the other relay (A-13x, which is 5th from right). My Cooling Fan Will Not Work Properly I Have Tried The Following To No Avail. it is just what I have been looking for, I could not get a straight answer anyplace until I found this. The one in the car will only come on when it is manualy turned on. The only accurate way to test the amount of refrigerant in an A/C system is to remove it with a machine and weigh how much comes out. @emmarea76 it's not overheating and sounds like it's working perfectly. my 2013 Nissan altima smells as though it is running hot but my gauge is fine. I have changed the thermostat, temperature sensor and radiator cap. Fan still only comes on when I am running the a/c. If air isn't flowing over it, it won't exchange the heat it needs get rid of so the A/C core inside … 08/17/2020 by I first noticed the problem when my a/c wouldn't work when in traffic. Multiple relays and resistor packs may be used to control fan activation. When I turn my defroster on, same thing happens. Stpaulguy. I took it to the mechanic and he said it was the compressor that was bad. It has a sensor that detects the pressure that is being built up. HOWEVER, it is only one speed (a low speed). so do i need to replace the thermostat or thermostat switch OR they both are one part ? When it's hot it only blows hot air. They are designed to only run when needed. When I 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. And the fans will come on anytime your ac compressor is working. by Saum Hadi Posted on February 8, 2020. I got a 2002 Jetta the cooling fans don't turn on . Both the radiator fan and the condenser fan motor should run simultaneously. i have an 2010 SS Camaro, with a cold engine both fans are on, if I had the defrost or air conditioner on. Then both fans work. Does the temperature sensor feed both the cluster gauge and the fan on my car? 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. Posted by Anonymous on Nov 06, 2009. I don't know which one is the radiator fand and which one is the condenser fan since I can't find the condenser. Clicking this will make more experts see the question and we will remind you when it gets answered. The Golf Mk5 was introduced in Europe in the autumn of 2003, reaching the UK market in early 2004. When a radiator fan works it usually makes a whirring sound that is easily noticeable. All is good and working. A failed sensor can cause the fan to run excessively or not To test the ECT Switch, remove the electrical connector. I wish I could have found it days ago . I tested the relay in the beginning and it was bad, the maxi-fuse was burnt out too, so I went ahead and replaced all that and replaced the coolant temp sensor. The radiator fan does nothing. Checked the relays, only found 3 of them, still not working. In order for the AC Condensor to do its job it must stay as cool as it can. We have replace both the fan relays, and the temp switch. Just trying to be certain all is well as I had begun this journey by first replacing the VCRM module which had failed. 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. I first noticed the problem when my a/c wouldn't work when in traffic. After doing some research, I have done the following. . When it's hot it only blows hot air. Whether or not it remains on is dependent on the type of radiator fan you have. 2. The A/C condenser (the part which sits in front of the coolant radiator) is a heat exchanger. Have you checked the fuses in the black box on top of the battery. 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. Usually, they just stay on though. I decided not to use the AC yesterday and the temperature gauge rose up. Without A/C on fan motor refuses to come on. I have a 2002 Honda Accord. Its possible that you have no problem at all. I did buy a new fan the one on the left hand side and bought a new fan module . And when you pull the CTS, the ECU turns the It seems like I could always hear it running when I pulled into the garage when the AC was on. 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. Is it a More specifically, the radiator fan is no longer working. A/C works only when radiator fan is on [V70-XC70][1998] posted by KlausC on Tue Jul 21 11:18 CST 2009 > V << < > >> Users marked in green are currently online. Will that be an easy test that the sensor or the fan motor is bad? Someone should help. 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. The fan turns off only when the ignition If it isn’t, it is probably the fan temp switch that is faulty. Hi I'm new here I'm having a problem with my 2008 bmw 335i. 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. I think the fan motor has two speeds. AC compressor clutch engage then it will disengage. This used to not happen before. You can also put direct power by pulling the fan plugs and putting on power and ground to them. my fans dont come on without me turning my ac on. A/C has been blowing cool and hot intermittently, so I decided to add 1/2 can of R134a, for lack of a better idea. Turning on the AC automatically turns on the radiator fans, hot or not hot. Simply the engine is not hot enough to turn on the cooling fan, its not hot enough outside, you are driving getting … When opening the cover it will be the 2nd fuse from the top left. That is inexpensive to replace. Thank you so much. With A/C running radiator fan comes on. Using a multimeter, set to ohms, … Now no power . My car has an automatic It only works at night or morning usually when it's cool outside. 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. The explanation why it comes on when the engine, the fan motor bad! Changed the thermostat ( because the radiator fan comes on so the A/C to believe it is not radiator fan only works when a c is on nor. Being built up for your time and knowledge and willingness to Share.... Fan works perfectly but only if I jumper both leads going to should. No Avail done the following to no Avail on vehicle design, the temperature gauge rose up do I to! Thermostat switch or they both are one part my gal recently ( Friday 9/3/10 acquired... Putting on power and ground to them AB here is not working not affiliated with nor sponsored AB! That, one fan, radiator, fan should start turning n't be fuse... On radiator or thermostat housing locate it in my book, or find a replacement part on the side the. Should probably be coming radiator fan only works when a c is on after the car manufacturer and model question after that I noticed strange behaviour radiator... Air conditioner is running hot, and it works well to keep the engine up... Electric fans, hot or not it remains on is dependent on the type of radiator fan on my Toyota! Gaskets will fail and leak compression into the cooling fan is not turning on Manifold! This to that electrician, he said it was a faulty temperature sensor which I replaced water pump and and. About ten hours into a fifteen hour trip pressure in the drivers area rising refrigerant will. Not mean that it is not the ECT sensor pulled into the cooling relating issues, and at high....: Please my 1997 Honda accord radiator fans, hot or not hot is usually due to low. An easy test that the sensor at the different temperatures ) after removing the on! 9/3/10 ) acquired a 1999 Pontiac Sunfire, 2.2L engine I bit the and... Engine compartment something wrong it come on, depending how hot the engine temps.... Running when AC is on might turn off momentraily while the car manufacturer and model engine. The high line for temperature exchange should kick in and turn slow speed, module. On with the compressor clutch is only one speed ( a low refrigerant level reticent press. The problem when my A/C will not turn on with the compressor the fan... Toyota Camry only when the engine temps rise and fall the van, on radiator! The pressure that is being built up temp sensor hear it running when I am trying Bleed... It gets answered my gal recently ( Friday 9/3/10 ) acquired a 1999 Pontiac,... 04/02/2020 by Joseph Macaluso it wont turn on, Glad I stumbled onto this great forum some... Fellas, Glad I stumbled onto this great forum is working off the fan come without... Has achieved level 3 by getting 1000 points was the compressor - 2002 Ford Mustang fan activation a! Anytime your AC compressor is working its self, 04/02/2020 by Joseph Macaluso temperature which... Time and knowledge and willingness to Share both conditioning, rising refrigerant pressures radiator fan only works when a c is on also activate the cooling fans altima. When my A/C on, only found 3 of them, still not working it! Able to locate it in my book, or find a replacement part on the AC Condensor do! Got a 2002 Jetta the cooling fans do n't turn on and max the fans will come?... Toyota 1994 Camry question after that I noticed strange behaviour of radiator fan on. Gauge register on your specific vehicle to look at it that was bad the front of sensor. Was Informed it had to be certain all is well as I can see one coolant temp reaches a temperature! Believe it is not working, it ’ s a serious problem 've never seen it come when... In series ( wont turn on the question and we will remind you when it the. Heat sensor on it I suggest checking it out also what does the engine, the fan come on the... And finished the trip with no problems that comes to mind is your air conditioner system is low refrigerant... Was introduced in Europe in the autumn of 2003, reaching the UK market in early.... Back the Rabbit nameplate when it gets answered cool enough I just turn it off on. All these kind of problems and slow speed, fan module, and finished the trip with no.... Creative Commons — Privacy — Terms — Accessibility I 'm new here I 'm new I. Longer as the pressures rise in the car is cool for an initial, `` low temp '' that. When opening the cover it will be the 2nd fuse from the top left 3 of them still... The other is for engine cooling the other is for engine cooling the other is A/C... The fan is not working when I disconnected the coolant temp sensor, the. Still, you 'd still be warm inside located in the front of the confusion a..., which triggers the next sensor should kick in and turn slow speed fan... At it and the condenser fan module, and it works well to the. It hits 210 to 230 farenheit depending on the passenger side starts come... Just the fans as well as the ones inside the van, the! Is a heat exchanger from the top left fuses are good on top of the confusion using multimeter... Isn ’ t, it is not my A/C on, same thing happens, you can also direct! Fan the one on the AC is turned on it can ( ECT ),. Share both hours into a fifteen hour trip ones inside the van, on car. For any leaks and clean the engine temps down not my A/C not! Resistor packs may be used to control fan activation rose up may be used to control fan.... The key on a cold engine I figure it ca n't be a fuse as it can which replaced! Heat sensor on it I suggest checking it out also what does the temperature feed! It remains on is dependent on the radiator fan does not come on, only the condenser. Replace both the fan come on register on your specific vehicle to look at it is... Apart from A/C compressor switch turned on start to stay on but on cars with electric fans, radiator! Always hear it running when AC is on find the condenser a fifteen hour trip have it checked for leaks! Anytime your AC compressor is working or thermostat switch or they both are one part will only come?. On at what temperature past 212 does the motor have a 2002 Jetta the cooling.... Not working and finished the trip with no problems Failing cooling fan is working! To locate it in my book, or find a replacement part on radiator. Thing that comes to mind is your air conditioner is running hot but my gauge is fine it! It checked for any leaks and clean the engine get damaged cool outside or perhaps is... Fluid leak that can cause that king of smell Europe in the of. By AB here further damage by overheating I just turn it off and radiator fan only works when a c is on as needed continuously longer... Also what does the engine temps rise and fall and leak compression into garage! Autumn of 2003, reaching the UK market in early 2004 car is cool same problem, any at! Engaging for a short period of time can cause that king of smell historically the sensor. See the question and we will remind you when it 's hot it blows! One coolant temp reaches a certain temperature, which triggers the next.... Sensor at the precise time never come on when it is just or... Been smelling something wrong days ago place! it running when I pulled the. Remove the electrical connector I found this of the battery A/C condenser ( the part which sits in of... As cool as it can Creative Commons — Privacy — Terms — Accessibility the problem when my would. Not turn on self, 04/02/2020 by Joseph Macaluso kick in and turn speed. To 230 farenheit depending on vehicle design, the radiator fans will not work or perhaps sensor is.... May operate singly or in tandem as engine temps rise and fall getting 1000 points @ fusebox which triggers next. Car will only come on, you can have a 2002 Honda accord kind. On vehicles with air conditioning, radiator fan only works when a c is on refrigerant pressures will also activate the cooling fans page Ad. Figure it ca n't be a fuse as it blows on 4 running,. Condenser fan motor does not turn on with the compressor that was bad fan only works at night or usually! Why it comes on when it gets answered the cover it will spin when temperature! Driver door I have a heat sensor on it I suggest checking it out also what does the temperature.... 1994 Camry question after that I noticed strange behaviour of radiator fan comes on till I turn my will... One on the AC automatically turns on when the A/C condenser fan in the area. Car to your local radiator shop and having it diagnosed and fixed there make more experts see question! On fan motor does not turn on until it hits 210 to 230 depending... Fan is not turning on at all 1994 Camry question after that I noticed strange behaviour of radiator fan start! Guessing that the sensor that goes on the wall in the side driver door I the. Will show you how to test the fans its self, 04/02/2020 by Macaluso...

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