I'm in the process on working on my '83 944. My problem was that the fans
did not turn on. I had to replace the Auxiliary Fan Switch. Basically
just
a temperature sensing switch. When the car gets to hot the switch breaks
down casing a short (short to ground if I remember correctly) in the fans
system letting them turn on. When the car gets back to the temp it should
be the switch opens those turning the fans off.
You say, how is this going to help me? As I was reading up on the problem
I
also came across the problem of the switch acting the other way. The
switch
could be bad and break down a lot sooner and your fans turn on.
There is a way to test this switch but it's not easy to get to. When up
open the hood (or in your case the bonnet) it is located on the top right
side of the radiator. It has 2 (or 3) wires coming from it. You can test
it in the car by hooking an ohm meter to it and seeing what temp it takes
to
short the switch. A better but more work (because you have to partially
drain the radiator) is unscrewing the switch (after you drain the radiator
to the level of the switch). Hook up your ohmmeter and add hot water to a
container with a thermostat so you can see what temp it shorts and opens.
Just make sure when you're adding antifreeze to get the correct type for
aluminum engines and bleed the system
As far as I know, you can get 2 temp settings for these switches, 75C and
92C.
good luck,
Andre
"Alec" <alec@[EMAIL PROTECTED]
> wrote in message
news:mv2dndB7gOARhQranZ2dneKdnZydnZ2d@[EMAIL PROTECTED]
> Hi
> I have a 1987 944 standard 8 valve model. This is a UK car, RHD and has
no
> air conditioning.
>
> It has one cooling fan which seems to come on too often. The car does
not
> overheat and the gauge sits just below halfway.
>
> Even on a cool day the fan will be on after a run when the ignition is
> turned off. It will run for a few minutes.
>
> It is my view that the fan should only run if the engine gets really hot
.
>
> Am I correct?
>
> The Clarks Garage site is not really of help as cars of this age without
> A/C
> and with one cooling fan are not explained.
>
> Alec
>
>
>
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