C5 X7 2008 Blower Control Module

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admiral51
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C5 X7 2008 Blower Control Module

Post by admiral51 »

Right this car is kicking me at every turn, just gone out to put it at the back of the drive and now the heater will not work, lights up and even the aircon kicks in but not a single turn of the blower, can set it from zero to max and alter the temp but blower refuses to start. :evil:

Off to B&Q to purchase some really big sledge hammers :rofl2:
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myglaren
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Re: C5 X7 2008 Blower Control Module

Post by myglaren »

There have been several posts concerning this and one of the simplest fixes was to remove the blower module and re-fit it.
Another to bridge the pins in the connector to kick the blower back into life.
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Re: C5 X7 2008 Blower Control Module

Post by Hell Razor5543 »

Something worth getting (especially as the car gets older) is some proper Servisol contact cleaner. This helps to get contacts cleaned up, switches working properly again, and can even allow some motors to spin again.
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Paul-R
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Re: C5 X7 2008 Blower Control Module

Post by Paul-R »

This is the most recent thread about the heater resistor (actually an electronic control unit).

viewtopic.php?f=3&t=61293

Incidentally mine is still working after the most recent reset.
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Re: C5 X7 2008 Blower Control Module

Post by admiral51 »

Thanks for that Paul, my apologies for the late reply i will be working on the Devil car tomorrow and the weekend :)
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Re: C5 2008 (X7 ?) Turbo Fault

Post by admiral51 »

Tried to sort out the blower issue, think i have found it but didn't want to push my luck as it did move a little bit left and right but looking at previous posts it needs to be rotated to the right.
Hopefully this picture is the correct part.


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Paul-R
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Re: C5 2008 (X7 ?) Turbo Fault

Post by Paul-R »

That's it. Don't know why you think it needs to be rotated to the right to unscrew as I have repeatedly said it unscrews anti-clockwise about a quarter turn. It will be very difficult to get moving if it hasn't been out since the car was built :evil: .

Once it's out though it won't take very long to try the bypass trick and then see if that has (temporarily) fixed things.
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Re: C5 2008 (X7 ?) Turbo Fault

Post by admiral51 »

Thanks for that Paul, i was upside down in the footwell at the time and yes you are correct i got my left and right confused, and i even looked at the pic in the other posts about it and it says turn anti clockwise, at least i found the right part and yes it is held in place well
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Re: C5 2008 (X7 ?) Turbo Fault

Post by Paul-R »

Get your expletives and spray-on skin ready.
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Re: C5 2008 (X7 ?) Turbo Fault

Post by admiral51 »

Paul-R wrote:
16 Dec 2018, 18:52
Get your expletives and spray-on skin ready.


Fully stocked on one item, spray on skin i am short of :mrgreen:

Which pins are used to do the quick fix assuming i can get the damn thing out ?
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Re: C5 2008 (X7 ?) Turbo Fault

Post by Paul-R »

admiral51 wrote:
16 Dec 2018, 19:12
Which pins are used to do the quick fix assuming i can get the damn thing out ?
Don't know the pin numbers but there are two thin wires and two thick wires. It's the thick wires in the plug you have to join together.
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myglaren
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Re: C5 2008 (X7 ?) Turbo Fault

Post by myglaren »

Also perhaps worth unplugging the plugging back in to see if that will kick the blower off again - corrosion on the pins.
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Re: C5 X7 2008 Blower Control Module

Post by MikeT »

As for the blower module, if the jumper trick (is it necessary to remove it first?) shows it needs internal resoldering, I should be able to effect that fix.
Last edited by GiveMeABreak on 22 Dec 2018, 15:22, edited 1 time in total.
Reason: Relevant part Split from Turbo Post
admiral51
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Re: C5 X7 2008 Blower Control Module

Post by admiral51 »

Ok just a quick couple of questions.
Do i bridge the wires in the plug or the unit itself ?
Can i put 12 v direct to the unit with it in situ ?
Can i use the plug slot to rotate the unit or will it break ?

And Thanks Marc for splitting the threads will make it easier for the new owner :-D
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Re: C5 X7 2008 Blower Control Module

Post by Paul-R »

You have to take the plug off the control unit in order to be able to bridge the thick wires so, theoretically, you don't have to take the control unit out. HOWEVER, in practice the plug is so damn difficult to get off it's easier to do it with the control unit in your hand.

I doubt the control unit will need soldering as I have closely inspected my unit and cannot see any defective soldered joints. The prevailing opinion is that the blower motor is sticking slightly and putting an extra load which the control unit detects and then deactivates. Bridging the wires forces the motor to spin at maximum speed and then the motor will work the normal way using the control unit.

I have wondered whether the control is faulty and has become more fussy about the amount of current it will allow through and that's why fitting a new one effects a cure. But as my no-cost option will make it work for a while and is repeatable I'll continue that way. At least until I get fed up with it.