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Bora overheating - cooling fan doesn't run even with the A/C on

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  • #1

    Bora overheating - cooling fan doesn't run even with the A/C on

    it was the other day being stuck in the traffic that all the sudden the car started beeping and showing the overheating alarm.

    Checking under the hood, the fuse box looks ok and there's no sign of being melted down or damaged.

    Neither of the two fans don't work, even when I turn of the A/C.

    Is there any instruction or step by step guide that I follow to diagnose the issue?


    Thanks
    A
    Tags: a/c, bora, cooling system, overheating, step
  • #2
    Failing cooling fans was quite a common fault with Bora 4Motions. I assume it affected all models. There are a number of possible reasons why and they are usually related to the low speed fans having an internal wiring fault which caused them to stop working. Subsequently with the fans kicking in straight to high speed it can cause problems with the fan control module. When it fails you then have no fans. There are posts on it on this site way back when. Try searching on here and/or Googling it.
    2001 Bora 4 Motion Sport now used by number two son
    2011 Skoda Octavia Scout now with Underground Performance tune
    2010 Jetta 125 tdi dsg for the misses - Impressed
    2006 Polo GTI - Enhanced by some of Gav's magic - Absolutely loving it

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    • #3
      Check out some of Pranks past threads. Christian had a numbers of problems (and fixes) which he documented.

      VWWatercooled Australia
      http://www.vwwatercooled.com/forums/members/prank/
      2004 VW Bora 4motion | 3.2 Swapped - R32 Trimmings | BBS CH | Forever fixing this bitch

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      • #4
        The best resource I found when I had to solve this years ago.
        http://pics.tdiclub.com/data/516/A4_Coolant_Fan_testing_Rev_7.pdf


        If you decide it is the resistors, just consider that the whole fan can be bought new for about $100 each.
        MK4 GTI - Sold
        MK5 Jetta Turbo - Sold
        MK5 Jetta 2.Slow - Until it dies.

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        • #5
          To add my 2 cents, I had the same issue in my golf. Though even when the aircon said it's on it wasn't engaging.

          Turned out to be a dodgy connection to the radiator fan fuse on top of the battery.
          2002 Golf GTI - K03S | 3" Downpipe | 312mm DBA T3 Slotted with Forza Pads | | Forge 008 | Forge Hoses | ECS Performance Mounts | R32 and Urethane Bushings | Pipercross Filter | Sachs VR6 Clutch with 14lb Balanced Flywheel

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          • #6
            Originally posted by JustCruisn View Post
            The best resource I found when I had to solve this years ago.
            http://pics.tdiclub.com/data/516/A4_Coolant_Fan_testing_Rev_7.pdf


            If you decide it is the resistors, just consider that the whole fan can be bought new for about $100 each.
            That's interesting. It used to be around $800 to fix back in the day, say 2004/5 when I first had to fix mine. I ended up doing the resistor board fix and I haven't had to touch them since. Now some 14 years later the original fans are still in the car and it is approaching 450,000 kilometres.
            2001 Bora 4 Motion Sport now used by number two son
            2011 Skoda Octavia Scout now with Underground Performance tune
            2010 Jetta 125 tdi dsg for the misses - Impressed
            2006 Polo GTI - Enhanced by some of Gav's magic - Absolutely loving it

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            • #7
              Originally posted by Bora Sport View Post
              approaching 450,000 kilometres.
              They should put your Bora on a pedestal in the lobby at Wolfsburg... 450k is epic!
              2004 VW Bora 4motion | 3.2 Swapped - R32 Trimmings | BBS CH | Forever fixing this bitch

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