Xantia HDI fans - always on

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Albert T Cone - 30 Sep 2004 13:51 GMT

Hi Folks,

The fans on my Mum's HDi engined Xantia are switching on continuously, even
with the air-con switched off, and the engine cold. The water temp gauge
does work, so the sensor that uses is fine. The aircon needs regassing,
and is left switched off.
Any suggestions for what might be the cause of this? I know it isn't a
major problem in itself, but I wonder if there might be a temp sensor gone
wonky somewhere, or something.

Any help muchly appreciated.

Cheers,
Albert

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Frank Kemper - 30 Sep 2004 15:19 GMT

Albert T Cone <me@yahoo.com> haute in die Tasten:

> Any suggestions for what might be the cause of this? I know it isn't
> a major problem in itself, but I wonder if there might be a temp
> sensor gone wonky somewhere, or something.

I had the problem with my '94 Xantia X1 2.0i 8V petrol engine.
The fans would not stop even when the ignition was off and the engine was
cold. Besides that sometimes the overheating light and the stop light went
on, however the water temperature gauge remained under 50 degrees (which
seems reasonable). My repair shop exchanged an electronic control unit
named "Bitron", which cost me some 300 Euros;-(

Frank

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Albert T Cone - 30 Sep 2004 16:58 GMT

<spam-muelleimer@gmx.de> slurred :

> Albert T Cone <me@yahoo.com> haute in die Tasten:
>
[quoted text clipped - 11 lines]
>
> Frank

Ouch. I'm hoping it's a temperature sensor, or possibly the aircon-pump
fan switch thing.
I think (hope :) the situation with my mum's car is probably slightly
different to yours - there are no coolant warnings, and the fans only
come on when the ignition is on.

Thanks for the reply.

Albert

BTW, I thought a normal operating temperature (coolant) was around 85-
90C? 50 sounds quite low if that's right.

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brian - 30 Sep 2004 19:39 GMT

. My repair shop exchanged an

> > electronic control unit named "Bitron", which cost me some 300

os;-(

> > Frank
>
[quoted text clipped - 10 lines]
> BTW, I thought a normal operating temperature (coolant) was around 85-
> 90C? 50 sounds quite low if that's right.

If you can locate the Bitron unit, try unplugging it and then replacing the plug, preferably with some
wd40 sprayed onto the contacts.
This cured a similar fault on and older 405.

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Frank Kemper - 01 Oct 2004 09:47 GMT

Albert T Cone <me@yahoo.com> haute in die Tasten:

> BTW, I thought a normal operating temperature (coolant) was around 85-
> 90C? 50 sounds quite low if that's right.

Yes. 50?C is quite low. When I drive my car in city traffic, it takes
about ten minutes to have the coolant temperature rise to 90 degrees.
Then the gauge stands fixed, no matter how hard I push the car. Oil
temperature is a different matter. It will take far longer to get the oil
to 90 degrees, and temperature will rise to 120, if you happen to drive
longer distances at high speed (100 mph or above). Oil temperature will
decrease, if you slow down for a while.

Frank

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Rob Beech - 18 Oct 2004 01:05 GMT

> Albert T Cone <me@yahoo.com> haute in die Tasten:
>
[quoted text clipped - 15 lines]
>
> Citroen - Made in Trance

The HDI's do run cooler than the old derv engines.although 50 is low. (but
if the fans are on.....)
I have a 96N 1.9td xantia with fans that dont work at all at the moment.
(worrying in city traffic ...especially as i live in the city centre).
my normal runing temp is around 80degrees and doesn't move much where as an
identical car up the road from me has a running temp of about 90. I dont
think it makes too much difference.

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