Climate control sampler fan

[amba]

Sorry,but I know this subject has been raised before.Can anybody tell me if the "sampler fan" should be running all the time the climate control is on,or will it only work when "auto" is set.
I am getting really fed up with either having the car ...very hot when set to high..or very cold when set at any temperature from 27 to 18..at low it is really very cold so know air con is up to spec.
Please can somebody help me get this sorted

[TheBoy]

Yes, sampling fan should always run

[amba]

Thanks TB..is that allways with climate on or allways with ignition on,as unsure how to test it is working  

[TheBoy]

Thanks TB..is that allways with climate on or allways with ignition on,as unsure how to test it is working  

All time climate panel is on (not necessarily on auto).

[amba]

So looks like mine has stopped working ...time to remove and investigate..do you just solder in a replacement fan or is it more involved ?

[TheBoy]

So looks like mine has stopped working ...time to remove and investigate..do you just solder in a replacement fan or is it more involved ?

Bit more involved - I'm sure Marks_DTM will be along shortly with the details - you have to wire it on a different bit of the board.

[amba]

Can you get the fans from GM or cheaper to go to Maplins ?

[TheBoy]

Can you get the fans from GM or cheaper to go to Maplins ?

Vx wont sell you fan - have to get whole ecu.  Can get fans easy enough, but have to connect them differently on the board...

[amba]

Is there any wiring details on the site,or details of fan replacement and type to get.

[TheBoy]

Is there any wiring details on the site,or details of fan replacement and type to get.

As I said earlier, hopefully M_DTM will be along, as I seem to recall he has done it before.

[Marks DTM Calib]

Right

Its not the fan that fails, its the drive circuitry...

What I do is remove the old fan and fit a 12V 25mm x 10mm PC type fan (available from Maplin for a fiver) which is screwed to the climate panel case where the old fan used to draw from.

The two wires (you dont need the sense wire) are then wired into the outer two holes of the PCB where the old fan fitted.

If I do another one, I will create a maintenance guide.

[amba]

Thanks for info Mark,will try your advise and get the fan from Maplins and have a go at it....pity I wasn,t closer to you for "on hands advise".Thanks again

[Marks DTM Calib]

Thanks for info Mark,will try your advise and get the fan from Maplins and have a go at it....pity I wasn,t closer to you for "on hands advise".Thanks again

The only thing to be aware of is the direction of blow of the fan but, you can test this before full re-assembly.

The fan needs to be screwed to the rear palstic cover, the 25mm version fits very nicely over the duct hole where the old fan used to draw. I seem to remember drilling some small pilot holes from the top and then using some very thin machine sacrews from below to hold it in place.....its actualy pretty obvious when you take it apart.

[Andy B]

Sorry,but I know this subject has been raised before.Can anybody tell me if the "sampler fan" should be running all the time the climate control is on,or will it only work when "auto" is set.
I am getting really fed up with either having the car ...very hot when set to high..or very cold when set at any temperature from 27 to 18..at low it is really very cold so know air con is up to spec.
Please can somebody help me get this sorted

Check visually that your fan isn't running first. A few weeks back I was convinced that mine wasn't running, nothing seemed to happen with either a tissue or SWMBO's ciggy smoke. When I pulled the centre bit of the dash forward, you can see the fan - just - and it was running as it should.

[Marks DTM Calib]

Sorry,but I know this subject has been raised before.Can anybody tell me if the "sampler fan" should be running all the time the climate control is on,or will it only work when "auto" is set.
I am getting really fed up with either having the car ...very hot when set to high..or very cold when set at any temperature from 27 to 18..at low it is really very cold so know air con is up to spec.
Please can somebody help me get this sorted

Check visually that your fan isn't running first. A few weeks back I was convinced that mine wasn't running, nothing seemed to happen with either a tissue or SWMBO's ciggy smoke. When I pulled the centre bit of the dash forward, you can see the fan - just - and it was running as it should.

Beware, the first stage of failure is slow running.....and sometimes they dont start at all....but, the speed is not enough to get a decent level of air sampling.