focus st mk2 fan always on?! help/advice please

[skypeller]

as titled

recently bought a ford focus st1 2.5 turbo in blue. ive mainly been a ford and bmw man all my life having 20+ cars (mainly 6cyl bmws) i decided to try a focus st as i found my old st170 2004 a bit gutless after several 328i e36s and 330ci sports

3 door lovely condition just replaced the front under tray the part that goes under the radiator/front bumper as it was fractured and parts of it were missing

ever since ive had it when i turn the engine off i notice the sound of the engine fan(s) running down to a stop.... its annoying because i know the car IS NOT oerheating its temperature is not obscure in anyway

this is my next thing to rectify so wondering if anybody has any advice on where the coolant temp sensor is on these volvo engined focus's ?

thanks again

j howells (plant maintenance engineer)

[anonymous-user]

Is the A/C on?

[skypeller]

No the a/c is off mate as I suspected that might be something to do with it

[Dogwatch]

Don't know about other Fords but on the Focus turning the airflow direction selector clockwise round to full demist automatically switches on the aircon. Confusingly the indicator light on the a/c switch doesn't illuminate.
Turning the selector slightly anti-clockwise switches off the a/c and at idle the revs drop slightly.

[skypeller]

yeah I read about that cheers mate but still fan is on all the time I think it's even on when it's stone cold

Engine doesn't overheat according to the gauges

[Shadow R1]

Are you sure its the fan running, as my focus (07) it had a sound like that.
When i first got it, i had a look if the fan was running, but it wasn't.

I turn the car off and then i hear something spin down.
I think its the alternator, so did the spanner man, but it is charging fine, so i have just lived with it.

[skypeller]

Ah it could be then cheers mate

[theshrew]

I presume your on about the cooling fan not the heater fan ?

If so you have a problemo. Ive only had mine come on once since ive had it. These engines seem to run pretty cool.

Be 100% sure the car is not getting to hot. Turn the car on from stone cold, run for 2 min. Is the fan on when you turn ign off ?

If no run the car see what temp the fan kicks in.

If yes check if the fan is on when the engine is runnig and not when you just turn ign off. Id imagine it will be on when the car is running.

Sounds like you have a electrical problem and the fan is just kicking in to soon. On a older car id say just fit a new switch. However these days id expect its a bit more complicated than that. I know on our trucks we can program the temp when the fan kicks in, i presume you can on the Focus to maybe thats been changed.

You could get it pluged into a machine that will probably tell you. Or if it was me id fit a switch anyway, see what happens.

[neiljohnson]

Alternator has a clutch on the pulley so it will run on when the engine is shut down but this shouldn't be doing this for very long after shut down (seconds if that) plugging a diag machine in & checking the live data is a good idea as is physically checking the fan is actually on

[Shadow R1]

neiljohnson said:

Alternator has a clutch on the pulley so it will run on when the engine is shut down but this shouldn't be doing this for very long after shut down (seconds if that) plugging a diag machine in & checking the live data is a good idea as is physically checking the fan is actually on

Yes its only a few seconds, listen to an 08 today that had the same spin down noise.

[skypeller]

Makes sense that's precisely it I found out today about 3 or 4pm I investigated a bit and found no fault codes at all either tidy job

Thanks for advice guys

[Camaro]

Shadow R1 said:

neiljohnson said:

Alternator has a clutch on the pulley so it will run on when the engine is shut down but this shouldn't be doing this for very long after shut down (seconds if that) plugging a diag machine in & checking the live data is a good idea as is physically checking the fan is actually on

Yes its only a few seconds, listen to an 08 today that had the same spin down noise.

Thats what it is! Wow, thanks guys, been wondering what the 'spin down' noise has been on my 08 focus for ages!

[Lumpyuk]

My 57 ST fan stays on quite a bit on my car afters its turned off (at very random times), as I understand this is normal for the ST as long as it isn’t turning on EVERYTIME u switch the engine off after say a few minutes use.

[thebigmacmoomin]

Mine (2007) stays on after the car is off sometimes. Not that often, ones every 6 months or so.