W124 fan sensor

Discussion in 'Engine' started by Williamwoo, Jul 15, 2011.

  1. Williamwoo

    Williamwoo Active Member

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    Jul 8, 2010
    Location:
    Somerset / Chives, France
    Car:
    W124 E320 estate / Audi A6 BiTdi / Skoda Yeti 4x4 / VW Caravelle
    Hi all,

    I believe I'm right in saying that the 2 auxiliary electric fans should cut in either when the engine gets hot (90 degrees) or the aircon is switched on. Mine don't come on in either case - where is the temperature sensor for the fans. (I have a sneaking suspicion this should be easy and I'm being stupid, or that I didn't reconnect it when I rebuilt the engine wiring loom, but in either case I'm damned if I can find it!)

    Thanks in advance.
     
  2. Ian B Walker

    Ian B Walker MB Enthusiast

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    Jun 7, 2003
    Location:
    Freckleton
    Car:
    300-24, saloon and coupe, E300 24 valve diesel estate
    You will find it by the side of the thermostat. It has 2 wires going to it. You can short it out to see if it actuates the fans.
     
  3. OP
    OP
    Williamwoo

    Williamwoo Active Member

    Messages:
    569
    Joined:
    Jul 8, 2010
    Location:
    Somerset / Chives, France
    Car:
    W124 E320 estate / Audi A6 BiTdi / Skoda Yeti 4x4 / VW Caravelle
    Thanks for that. However, the only wiring going to the thermostat are two connectors, both going to the top, one with 4 wires going to it and the other with 1. On the right hand side there is a largish (15mm?) bolt that seems to serve no purpose - might this be where the sensor would screw in? (I haven't had the car very long and the thermostat housing has obviously been replaced relatively recently.)
     
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