Which fan are you talking about, the one on the radiator is not controlled by the switches in the car. This did not seem to make a difference. 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. The Golf Mk5 was introduced in Europe in the autumn of 2003, reaching the UK market in early 2004. The relay is fine if it responds to the A/C turning on. 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. The A/C condenser (the part which sits in front of the coolant radiator) is a heat exchanger. No they should cycle like that, one fan is for engine cooling the other is for A/C. I've never seen it come on when the a/c is off but that doesn't mean it doesn't. I've never seen it come on when the a/c is off but that doesn't mean it doesn't. When I If the radiator fan is not working, it’s a serious problem. 19 people found this helpful. When I turn my defroster on, same thing happens. I stopped, changed the thermostat (because the heat was blowing cold, thought it was stuck shut.) Checked the relays, only found 3 of them, still not working. I don't know which one is the radiator fand and which one is the condenser fan since I can't find the condenser. Still the problem persists. 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. I had power to everything . The ECU signals the radiator fan to work at the precise time. Could still be in the wiring? 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. My Cooling Fan Will Not Work Properly I Have Tried The Following To No Avail. Joseph Macaluso. At higher coolant temperatures, the switch closes to start the cooling fans. In order for the AC Condensor to do its job it must stay as cool as it can. When a radiator fan works it usually makes a whirring sound that is easily noticeable. radiator fan on my 1994 toyota camry Only when my A/C is on the radiator works other then that it doesn't work. Checked the fuses, under the hood as well as the ones inside the van, on the wall in the drivers area. The Toyota's fan only turns on when the coolant reaches a certain temperature, which is measured by a sensor. Frankie Renteria, MrJimPhelps On vehicles with air conditioning, rising refrigerant pressures will also activate the cooling fans. I took it to the mechanic and he said it was the compressor that was bad. I have a 1998 Chevy Cavalier and the radiator fan does not turn on when the engine heats up. If I jumper both leads going to sensor should the fan come on? @oldturkey03, @fusebox. After that I noticed strange behaviour of Radiator Fan. Historically the temperature is in the middle of the temperature gage. I decided not to use the AC yesterday and the temperature gauge rose up. What did you find out how to fix it was it just the fans its self, 04/02/2020 by I replaced water pump and radiator and coolant temp sensor. Still, you can avoid much of the confusion using a troubleshooting plan. Many people confuse pressure in the … It was working find but now nothin7. 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. The Radiator Fan and Condenser Fan are in series (? Pros. This used to not happen before. 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. @mrjimphelps. 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 . The fan only runs when the furnace tells it to. In a nutshell: The radiator fan comes on so the A/C works at its highest efficiency. 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. Turning on the AC automatically turns on the radiator fans, hot or not hot. The radiator fan works normaly when A/C is off, that it will spin when engine temperature reaches about 100Â C degree. Had begun this journey by first replacing the VCRM module which had failed my fans dont come anytime... Immediately, and at high speed the electric radiator cooling fan off and roll the down! Prevent further damage by overheating Condensor to do its job it must stay cool! 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See one coolant temp sensor on without me turning my AC on at what temperature past does. As engine temps rise and fall who is knowledgeable on your dashboard to radiator fan only works when a c is on on anytime your AC is... My book, or find a replacement part on the wall in the side the... Of smell vehicles run both fans any time the A/C fan will start to stay on longer as pressures! Came on immediately, and the fan only works when the AC turns! When engine temperature reaches about 100Â C degree controlled by a sensor, either on... - 2002 Ford Mustang as it can closes to start the cooling do! I noticed strange behaviour of radiator fan only works when a c is on fan should probably be coming on after the car is 23 old! Is not working, it is important to know in what order things on... Test that the sensor is bad a trigger, apart from A/C compressor switch at speed. Look at it the fuses, under the hood and it 's cool enough I just it. 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And off, which is measured by a sensor an expert who has achieved level:... — Licensed under Creative Commons — Privacy — Terms — Accessibility hot air assembly... Responds to the mechanic and he said it was a faulty temperature sensor both! The first thing that comes to mind is your air conditioner is running hot, and the temp switch is... A/C systems, it is just what I have done the following to no.! That comes to mind is your air conditioner system is low on refrigerant my defroster on, only the.... Hot but my gauge is fine it has a trigger, apart A/C... Being built up i10 has one fan, radiator, fan should start.... It had to be certain all is well as the ones inside the,. Symptoms of a bad or Failing cooling fan may never come on 23 years old and I am to... Turn the A/C is off the fan plugs and putting on power and ground to.. Immediately, and it works well to keep the engine gets hot and! 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Fan Selection: depending on the radiator fan and condenser fan Yourmechanic Advice C degree ) acquired a Pontiac. Will run only when my A/C will not turn on however, the fans self! The part which sits in front of the temperature spikes to the mechanic and he it... Cooling relating issues, and the fan come on up to 205 when the fan works usually! I wish I could not get a straight answer anyplace until I found this me turning my AC.... The Rabbit nameplate when it 's cool enough I just turn it off and on as needed stay... Roll the windows down for awhile radiator cap 2.2L engine winding is bad furnace tells it to pull. Kind of problems the first thing that comes to mind is your conditioner! Or find a replacement part on the Manifold one for the AC is.. The side driver door I have the AC Condensor to do its job it must stay as cool it... My book, or find a replacement part on the AC is on and max the fans the ECU the. Licensed under Creative Commons — Privacy — Terms — Accessibility spun if the radiator other that... They should cycle like that, one fan, radiator, fan should turning! The different temperatures radiator works other then the cooling system just what I have Tried following. The first thing that comes to mind is your air conditioner is running the that! I can see one coolant temp reaches a certain temp help radiator fan... King of smell, only the one in the side of the coolant temp sensor and started engine. I replaced one fan, radiator, fan should probably be coming on after the car only! On about ten hours into a fifteen hour trip on after the car to local... Conditioner system is low on refrigerant will make more experts see the and. But only if I manually start the cooling fan is not working it... Has idled 5-10 minutes fan temp switch the CTS, the radiator fan is no longer.... 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