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    Thread: Radiator fan won't work, Ive tried everything............HELP!

    1. 02-15-2008 07:57 PM #1
      O.k. I tested the radiator fan and it was bad, so I replaced it. When the engine gets hot it still wont turn on. So I pulled the radiator temp sensor and put a jumper on the plug and the fan kicks on. So I replaced the sensor with a brand new one and drove the car around and what do you know...................radiator fan still wont kick on

      Does anyone have any good suggestions, it would be greatly appreciated.

    2. Member Samz09's Avatar
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      02-15-2008 07:59 PM #2
      happend to my sister cabby, tried 3 fans, new relay, before we realized that there wasnt supposed to be any emty spot in the fuse box , put a fuse it and wala

    3. 02-15-2008 08:01 PM #3
      I checked the fuses..........they are there and in good shape!

    4. Member _a2coupe2a_'s Avatar
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      02-15-2008 08:07 PM #4
      im having the same problem and im actually planning on digging into it tonight. Ill let you know what i find.

    5. Member Jetta A2 1989's Avatar
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      02-15-2008 08:13 PM #5
      Is the lower rad hose getting hot?

    6. 02-15-2008 08:19 PM #6
      Yes, the thermostat is working. Upper radiator hose gets hot and after I let the engine run the temp sensor gets hot to the touch. Where is the relay for the radiator fan/cooling system. Is it the one mounted on the upper portion of the radiator fan housing? I havent checked it yet........could that be my problem.

    7. Member Jetta A2 1989's Avatar
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      02-15-2008 08:55 PM #7
      Check the AC relay position #5 on a 1988, Pos #1 late 89 and up.
      #13 stamped on relay.
      Does low speed run when you set the selecter to defrost?
      The relay on the fan shroud is for hi speed only. IIRC

    8. 02-15-2008 09:21 PM #8
      Where is that relay?

    9. Member Jetta A2 1989's Avatar
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      02-15-2008 09:33 PM #9
      At the fuse/relay panel.

    10. 02-15-2008 10:31 PM #10
      The relay is on the top of the rad . Check the connections on it it might be rusty check for broken wire
      You say VoilÃ* and maybe Wala !

    11. Member compu_85's Avatar
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      02-15-2008 10:50 PM #11
      The relay only runs the high speed...
      Is there power to the switch on the rad? If you jumper the wires at the switch does it work? The wiring for rad fan is really very simple...
      -Jason
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      02-15-2008 11:31 PM #12
      got the same problem!!! ah!

    13. Member Jason_Reuben's Avatar
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      02-16-2008 02:37 AM #13
      When you jumped the fan switch, Did you jump it from the 12v pin to both high and low on the fan????
      Or did you jump power from the battery to the high and low wire in the connection?
      Did you check for 12v at the fan switch?

    14. 02-16-2008 02:40 AM #14
      I jumped it from both high and low and it kicked on in both speeds, I didnt jump it from a 12 volt source, I jumped it straight from the plug that conects to the radiator temp sensor. I ordered the two relays and I hope that will fix it. If it dosent Im stumped


      Modified by surfer459 at 11:55 PM 2-15-2008

    15. 02-16-2008 10:59 AM #15
      just a hunch, but check the relay on the fan shroud. fans wont work if that relay is toast. ask me how i know.
      '11 Routan SE (black), '01 Jetta GLX VR6 5spd (silver)
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    16. 02-16-2008 03:38 PM #16
      I hope its a relay

    17. 02-16-2008 04:51 PM #17
      i know that they don't turn on until your car gets hot enough, my fan don't even turn on till the temp gauge gets to half way mark. check and see what your temp guage shows if it is over half way and your fan is not on then you have a problem

    18. 02-16-2008 05:51 PM #18
      The temp of course goes past half way. I let it get three quarters of the way up and turn the car off and the fan never kicks on.
      I also noticed the upper radiator hose gets hot and the lower hose doesnt. I have a brand new thermostat.........could my water pump be toast?


      Modified by surfer459 at 2:56 PM 2-16-2008

    19. 02-16-2008 06:02 PM #19
      Quote, originally posted by surfer459 »
      The temp of course goes past half way. I let it get three quarters of the way up and turn the car off and the fan never kicks on.
      I also noticed the upper radiator hose gets hot and the lower hose doesnt. I have a brand new thermostat.........could my water pump be toast?

      Modified by surfer459 at 2:56 PM 2-16-2008

      thermostat is blocked by air. bleed again.
      '11 Routan SE (black), '01 Jetta GLX VR6 5spd (silver)
      FE ///Motorsports VCDS Hex-Can, if you need help.

    20. Member gti2.0016v's Avatar
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      02-16-2008 06:13 PM #20
      I'm working on the same problem. I've NEVER had this much trouble with a cooling system This time I'm putting a aspirin in the thermostat or drilling a hole in it.

      Anyone ever try the apsirin thing? I'm about to burn this car to the ground. I've tried to get the air out numerous times. By the way it's on a passat but all 4cyl cars are the same. [IMG]http://**********************/smile/emthup.gif[/IMG]

    21. 02-16-2008 07:05 PM #21
      How do I bleed a thermostat?

    22. 02-16-2008 08:23 PM #22
      Never mind..........its bled and the top and bottom radiator hoses are now warm. I figure the only thing else to try is the high speed solenoid. That has to be it.

    23. 09-09-2008 02:13 PM #23
      I have a problem the car over heats and the cooling fan does not come on.
      the heater inside the car also cuts out .
      temp reaches 3/4 on the gauge.
      fan works if i put 1v across the fan itself works on low and high speed.
      no relay ontop of the fan shroud any suggestions its a 1992 j plate runout mk2

    24. 09-20-2008 07:01 AM #24
      my lower rad hose is not getting hot but all other ones are red hot.fan works if i put 12v across the terminals direct from the battery but it wont work other wise.
      any help would be appreciated

    25. 09-20-2008 07:02 AM #25
      how do you bleed the system?

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