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The radiator fan won't turn off immediately when the car is turned off.

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  • 18 Answers

Timed relay

Posted on Oct 14, 2013

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: radiator fans on my neon are not turning

could be a number of simple problems. one is your temperature sensor...if it fails it wont turn on your coolant fans. 2nd is your coolant level might be low...if its low then the hot coolant wont be able to "come in contact" with the coolant temp sensor thus result in over heating...i doubt its fan failure as it is highly unlikely that BOTH fans would fail at the same time. however it is possible. lastly is electrical to both fans has failed...put a tester into the connector (not into the fan) and start the car....let it warm up...as it get too hot the voltage should suddenly be there...if not...then the fans are not getting power and you have electrical issues. may have to trace the wires and find out if they got damaged by a belt...the fan or other moving part... i hope this helps you out

Posted on Mar 12, 2009

yotaguy
  • 232 Answers

SOURCE: The electric radiator cooling fan will not turn off

As long as the fan eventually shuts off this isn't a problem,the fan will continue to run for a bit after the car is turned off,once it reaches a set temprature it will turn off.

Posted on May 02, 2009

  • 490 Answers

SOURCE: 2002 PT Cruiser LE (no Turbo) Overheating. (Fan

There is no machine for this,however a VERY skilled auto electric shop might be able to help.They really have to have a Gift with car wiring to fix your problem,it can be FIXED,find the right shop in your area.I will try and think this through to help you,this is what I used to do,It's not a book problem it is experience that will fix your car. I do have a question? How does your car run without the AC on?

Posted on Jul 28, 2009

mattvierra
  • 74 Answers

SOURCE: Radiator Fan Runs After Car is Turned Off

That is nothing to worry about the fan remains running after the vehicle shuts off in order for the engine to cool down. Once the motor cools down sensors trigger the fan to shut it off.

Posted on Sep 10, 2009

4743micheal
  • 54 Answers

SOURCE: Radiator Fan Stays On

A simple test would involve disconnecting the fan switch while the fan is on. If the fan then stops the switch has failed. If the fan continues to run remove the relay , if the fan then stops the relay has failed.
Various inputs/outputs at the relay should be confirmed to be 100% certain something strange isn't going on.
Above all be careful of the fan itself , if it's running obviously but if it's not it could start during repair

Posted on Mar 01, 2010

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I have a 2001 lancer there is water leaking from somewhere at the bottom of the radiator and the fans are not working when I turn the engine on what could this be, thanks Fiona


Almost certainly the radiator requires cleaning or most likely for a 10 year old car, replacing. Have a garage look at it. I'd expect that the lower 1/4 of the radiator is deteriorated (corroded) badly. You should replace the radiator hoses and clamps at the same time.

The fans do not come on immediately when you start the engine. One comes on automatically when the temperature gets high enough: there's a temperature switch in the bottom of the radiator that controls this. The other fan is for the A/C and turns on when needed. It usually starts when the A/C is turned on and the car is not moving.

When the car is moving more than about 20kph the fans are generally not needed.

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The 2.2 is blowing out the water from the radiator if i use air cond and drive hard but not if i leave the air off and drive surface streets. already replaced thermostat


When your air is turned on check and see if the radiator fan and condensor fan are coming on.When the air is turned on both fans should immediately turn on.If one is not this can cause an overheating issue when the air is turned on.

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Car is over heating, boiling in the overflow, this after 5km's the oil looks fine ?????? help


Check your coolant levels and make sure the hose between the coolant reservoir and the radiator aren't clogged. The cooling fan on the radiator may not be directly driven by the serpentine belt and may be on a clutch. If the clutch is broken the fan won't cool the radiator and the radiator won't cool the car. Get the car good and hot and see if the fan kicks on. To temporarily relieve the overheating in the engine, turn the heat on in your car.

May 04, 2011 | 1989 Toyota Cressida

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The fan on my Toyota Corolla is not running. I just changed the radiator and refilled the coolant. Shouldn't it run immediately I switch on? How can I tell if the fuse has blown?


What has the radiator got to do with the fan coming on? There may be a bad fan switch,screwed into the radiator,but you wouldn't change the radiator,only the sw ,if bad. You could jump the fan sw wires,turn key on, to test for a bad sw and a working fan

Mar 25, 2010 | 1990 Toyota Corolla

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1991 Escort GT overheats when idling in traffic, but immediately cools back down once moving again. The thermostat has been changed, as well as flushing the radiator, yet problem persists. What's the next...


The first thing to look at is the radiator fan(s) which must turn on when the engine gets to operating temperature. If the car has air conditioning, turn it on which should also turn on the radiator fan(s). Test the fan motor(s) by applying 12 power directly. If ok, look for blown fan fuse or faulty fan relay. The computer reads the thermal sensor and turns on the relay when the engine is hot. Hope this helps!

Mar 08, 2010 | Ford Escort Cars & Trucks

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Engine running hot


Possibly fan clutch or clogged radiator/condensor.
To check for fan clutch, hook up A/C gauges, turn a/c on watch high side gauge. 300 psi. and above run water on condensor, if psi. goes down to about 250 psi and holds. replace fan clutch.
If not, check radiator/condensor for dibris outside, and or corrosion inside the radiator.

Jul 07, 2008 | 1994 Isuzu Pickup

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