rad fan doesn't stay on when the car is off...

Kurt Deschler desch at alum.wpi.edu
Fri Sep 15 12:20:30 EDT 2006


The afterrun is controlled by the thermal switch on the back of the 
coolant neck. If you short the contacts together with the car off, it will 
turn on. It typically only comes on in the summer.
 	-Kurt

> Message: 2
> Date: Fri, 15 Sep 2006 11:14:39 -0400
> From: Kneale Brownson <kneale at coslink.net>
> Subject: Re: rad fan doesn't stay on when the car is off...
> To: tmb <the_questionist at yahoo.com>,quattro at audifans.com
> Message-ID: <4.1.20060915110739.01144788 at pop.powerc.net>
> Content-Type: text/plain; charset="us-ascii"
>
> Does the turbo cooling pump run when the injector cooling fan runs?   I
> think the radiator fan is supposed to run when the auxiliary pump for turbo
> coolant runs, but only if under-hood temperatures are sufficiently high.
> I don't recall how my former 5ktq ran, but in my 200q20v, the radiator
> fan/turbo coolant pump operation only occurs after shut-down if the
> underhood temperature calls for them to run.  The injector cooling fan may
> be keyed to run regardless of the sensor controlling the other two.
>
>
> At 07:43 AM 9/15/2006 -0700, tmb wrote:
>
>>
>> as soon as the car is turned off, the rad fan
>> stops.  the injector fan will keep cycling as
>> normal, but no rad fan.
>>
>> i'm concerned.  anyone have any suggestions?
>>
>> jason
>> tmb


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