Question about 2008 Volkswagen Gti

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I have a 2008 gti 2.5 The fan keeps running until the battery dies. I pulled the relays and still the same problem. Disconnected the fan switch at the radiator, again same result. Place help

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  • Volkswagen Master
  • 10,875 Answers

Your driver side fan is BAD. It is a control module built into it and uses bus signals from the ecm to turn both fans on to variable speeds. It gets power all the time. The ONLY way for that fan to turn on with the key off is the fan itself is shorted internaly. It's covered under your warranty...unless you are out of warranty. There is no switch. No relay. No nothing. Replace that big fan and be done with it.you dont need BOTH fans,vw had a problem with this on alot of vehicles

Posted on Apr 04, 2015

  • terry kinnicutt Apr 06, 2015

    Awesome. I have an o.e fan coming from WV today. I tried an aftermarket fan and had the same result. So im assuming the aftermarket fan was faulty as well. Hopefully the o.e fan will remedy the problem.

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  • Expert
  • 228 Answers

Hi, it sounds like you have a faulty relay, or sendor. At worse case a shorted wire.

Posted on Apr 04, 2015

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  • Volkswagen Master
  • 733 Answers

REPLACE BOTH FANS.IF U WANT TO KNOW WHY LET ME KNOW..

Posted on Apr 04, 2015

  • 3 more comments 
  • terry kinnicutt Apr 04, 2015

    After checking all the wiring and grounds I did replace the fan unit. I got the same result. Also swapped The relays, no change. Then I unplugged the coolant temp sensor, followed by the fan switch in the radiator. Still no change. Fans continue to run constantly.

  • TCI Apr 05, 2015

    OK.THE CAR STILL RUNS RIGHT?IF SO THEN U HAVE TO CHECK THE TWO 0.35MM WIRES THAT COME AT THE CONNECTOR OF THE FANS U MUST HAVE A SHORT OR CUTTED WIRE.WHEN EITHER OF THOSE TWO WIRES IS BAD THEN THE CONTROLLER WHICH IN UR CASE IS THE BIG FAN STARTS AT FULL SPEED.SEND ME AN EMAIL AT tcifusion@yahoo.com TO SEND U WIRING DIAGRAMM.IF POSSIBLE SEND ME THE VIN TO SEND U THE CORRECT ONES.......

  • terry kinnicutt Apr 06, 2015

    Wvwbs71k47w188539

  • terry kinnicutt Apr 06, 2015

    Wvwbs71k47w188539
    I did open the harness to check all the wires and found no breaks in them

  • TCI Apr 06, 2015

    OK BE PATIENT.THIS IS A GOOD PUZZLE U R DEALING WITH.USUALLY PUZLES NEED TIME AND CLEAR HEAD.WILL TAKE OUT DIAGRAMMS AND WILL SEND U.MAIL ME AT tcifusion@yahoo.com SO THAT I CANSEND U THE DIAGRAMS FOR U TO CHECK.U DID NOT TELL ME IF THE CAR RUNS OK...???LET ME KNOW AND BE PATIENT.....

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Benimur
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SOURCE: Radiator fan not working

Hi,

I am assuming that you are referring to the radiator fan. You need to verify that the fan motor is receiving 12V when it is supposed to be kicking in (engine hot) with a DVM (voltmeter) in its actual location. Having done this and likewise verifying that the ground is properly attached/connected, then your problem would be with the "clutch". Radiator fan clutch differs from aircon compressor clutch which is electrical and the transmission clutch which is mechanical. Most radiator auxiliary fans (not directly coupled) uses "silica oil". This oil has an inverse property, that is when hot it gets thicker and thus the rotation of the motor is transferred to the blades. There would be a filling hole adequately plug in or near the front of the fan assembly.

If your concern is not corrected by the addition of silica oil or if you can not measure 12V on the fan connector itself when it is supposed to kick in, then chances are your problem is electrically related. Some fan motor switching systems are coupled to the aircon switching.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on May 29, 2008

co7196
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SOURCE: 03 Audi A4- Coolant fan runs until the battery dies

What does the fan do when you restsrt/charge the battery? Start up again? Replace the sending unit, or unplug the sending unit first. If fan keeps running, the relay is faulty.
if it stops, the sending unit is at faulat. good luck

Posted on May 31, 2009

  • 436 Answers

SOURCE: how do i replace the radiator fan relay in an 05 town and country

this van has a solid state relay unit to control the fan, when it dies it just allows the fans to run. this relay is located behind drivers headlight, attached to the bumper towards the grill. It will either be bolted on or riveted on. There will be big fins on it to keep it cool. When you change this unit you have to mount it for it to work right (zip ties are no good) seen that before.




Posted on Aug 23, 2009

  • 56 Answers

SOURCE: The radiator cooling fans run continuously in my 1998 Toyota

Fan switch should be located in the upper radiator tank. Two wires to it. it works off the temp of the water.

Posted on Jul 12, 2010

duane_wong
  • 6826 Answers

SOURCE: fans wont switch off on audi a3, even when

Trace wire from fan to ground if pulling relay doesn't stop fan.

Posted on Nov 07, 2011

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