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Fans Running Constantly
https://forums.tipec.net/viewtopic.php?f=27&t=11547
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Author:  rawky [ Tue Aug 23, 2011 10:34 am ]
Post subject:  Fans Running Constantly

1991 S4 Auto

Hello Everyone,

The fans on my 928 have started running whenever I put the key in the ignition, even when cold. The only way to stop it at night is to open the bonnet!
I was told the first thing to go was the intake temperature sensor, which I unplugged and it made no difference. Therefore the problem lies elsewhere...

I believe there are two or three possibilities...
-Radiator Temperature Sensor, how to test this?
-Fan Controller, I believe I can test this a multimeter somehow?
-Auto Box Temperature Sensor, how to test this?

If I can test these sensors, especially the autobox one, from pins within the car that would be helpful!

Cheers!

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