xsara 2.0hdi fans running constantly

[Danbrown26]

Hello all,
can anyone bare some light on why my cooling fans are running all the time, they run with engine on but not ingnition only, its a 2000 2.0hdi 90bhp, this model only has a single coolant temperature sensor so ive kinda ruled that out as everything else is ok (no warning lamps and temp reads fine). if i pull the fuse (21) for the air con it kills the fans, now im lost,

Thanks

[wheeler]

Do they run all the time if the interior blowers are switched off ?

[Danbrown26]

not sure il check tomorrow

[RichardW]

If the direction is set to demist, chances are it's calling for AC. hence the fans are on all the time - normal!

[Danbrown26]

that makes sence, if it was set to demist would the a/c light be on or not

[wheeler]

It depends on the car wether the A/C light comes on or not, on a xantia it doesent, on a mk 2 xsara it definitely does. Either way if you turn the blowers off it should cut the A/C & therefore the cooling fans.

[Danbrown26]

yup that was it, on demist it puts the air con on with no light and starts the fans, user error. thanks for your help saved me a lot of messing around