Internal Fan and temperature Sensor

kipkenya · Post by **kipkenya** » 16 Jan 2005, 07:14

I've got an intermittent problem with the internal fan. Some times it works, some times not. I thought it might be the fan. Pulled it out but appears OK.
My question is. Where is the relay for it. And where is the cabin temperature sensor.
Also anyone no where the air con control box is?

Richard Gallagher · Post by **Richard Gallagher** » 16 Jan 2005, 12:52

I take it you are talking about a Xantia? If so there is no relay for the fan, it is fed directly from the ignition switch, which is well known to cause problems so start looking there (excess heat etc).
The cabin temperature sensor is behind the alarm LED and the aircon control box aka 'Bitron unit' is behind/below the nearside headlight, a right pig to get access to.

jack.dempsey · Post by **jack.dempsey** » 16 Jan 2005, 13:40

My fan is intermittent - I've found that giving the fan a firm 'whack' up under the glove box at the passenger side often 'wakes up' it up. I'm currently taking a break from peering upwards from the passenger foot well to try and figure what the problem is. Initital diagnosis is poor connection between the larger red cable and the fan, the connectors look to have been rather warm at some time and the spade connector has assumed a blackened look. I was thinking of all the horror stories, ignition switch, bitron unit (which I wouuldn't recognise if one fell on me) or even replacement fan - but I'm fairly sure my problem is simply a poor connection. Its usefull to train 'her indoors' in the gentle art of 'fan whacking' - well it gives her something constructive to do and a break from 'back seat driving'.

kipkenya · Post by **kipkenya** » 16 Jan 2005, 15:24

I'm getting conflicting information. Perhaps I should also say I have air con and climate control. The only diagram I can find in the Haynes Book ( an almost worthless publication with almost no real information) shows a relay, but this is for 1998 on.
Addition of a relay the best method and run the relay from say the cigarette lighter?

NiSk · Post by **NiSk** » 16 Jan 2005, 17:16

Citroën heater fans that work when whacked usually have come to the end of their brushes.
//NiSk

jack.dempsey · Post by **jack.dempsey** » 16 Jan 2005, 23:48

NiSk - I'll bear that in mind - are the brushes readily available or is it a case id getting a new unit ? If I can fix for a couple of pounds thats got to be preferable to forking out £100 +vat (and this is GSF price) for a new fan.