W124 fan sensor

Williamwoo

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Jul 8, 2010
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607
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.
 

Ian B Walker

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Jun 7, 2003
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Freckleton
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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.
 
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Williamwoo

Active Member
Joined
Jul 8, 2010
Messages
607
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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