My Xantia is overheating. It would appear that the fans in the front
> are not kicking in, so on a freeway it is fine, but in traffic the
> temp goes up very quickly and if very hot, Need to stop and switch
> off. It also seems to use water although I never see steam coming out
> of the radiator cap - there is a deposit around one of the hose
> seals, which may be a leak.
>
> I suspect that this is a problem with the switch which is referred to
> in the Haynes manual as the 'Biltron' switch. Question is:
>
> How difficult is this to get to and check/change ( Haynes seem to
> indicate that this is not easy!)
> How much should a new one cost
> If I let a garage do it, is it an expensive item ?
>
It could well be the Bitron sensor although I've not had to replace one. Try asking on alt.autos.citroen (I've just cross posted it there for you.