Xsara blower on (almost) full blast all the time

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AdieuHydropneumatic
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Xsara blower on (almost) full blast all the time

Post by AdieuHydropneumatic » 13 Oct 2019, 13:49

Dear Board

Have had a look around here and see that it is most likely resistor failure.

Just wanted to check this observation. Fan is on all the time at constant speed from Auto, 0 then through 1,2 & 3 marks BUT past 4th mark it goes to FULL blast. Would this indicate anything other than a resistor fail?

Thanks

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GiveMeABreak
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Re: Xsara blower on (almost) full blast all the time

Post by GiveMeABreak » 13 Oct 2019, 14:11

If this is a M II with regular A/C, then the blower control module will likely be located on the blower motor itself, shown separated as item (4) below. Your VIN will confirm.
Xsara Heater Module.PNG
And most likely will be the cause - it's usually all or nothing - but this is an older type of unit so may exhibit the specific issues you describe.

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Re: Xsara blower on (almost) full blast all the time

Post by AdieuHydropneumatic » 13 Oct 2019, 15:22

Hi Marc & thanks for your reply
VIN: VF7**************[VIN obfuscated, can be read by forum staff]
Cheers
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Re: Xsara blower on (almost) full blast all the time

Post by GiveMeABreak » 13 Oct 2019, 18:34

Ok, slightly different - from your VIN:
Xsara Blower.PNG
Part number: 644178. These retail at Citroen for £216.40 inc. VAT.

AdieuHydropneumatic
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Re: Xsara blower on (almost) full blast all the time

Post by AdieuHydropneumatic » 15 Oct 2019, 15:42

Hi Marc
I'm thinking of just replacing the whole blower unit rather than faff about. I've looked up a few but although my car is listed, when I put in Reg No in they all say not compatible. Would you be able to identify the correct part number for the whole blower unit for my VIN?
Cheers!

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Re: Xsara blower on (almost) full blast all the time

Post by AdieuHydropneumatic » 15 Oct 2019, 15:47

Hi again Marc
Just took this pic from under the blower as is if its any help?
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GiveMeABreak
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Re: Xsara blower on (almost) full blast all the time

Post by GiveMeABreak » 15 Oct 2019, 15:58

The part is 6441N4

No longer available from Citroen, but plenty of aftermarket ones available. Just make sure you confirm any replacement comes with the blower resistor module though!

And when you search, make sure you put in ‘Citroen 6441N4’

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Re: Xsara blower on (almost) full blast all the time

Post by AdieuHydropneumatic » 17 Oct 2019, 11:57

Hi Marc and thanks as always for your help.
Pulled down the carpet in footwell to have a good look at what I was going to attempt and took the pic I posted here. Didn't touch anything. Got into car yesterday started up and the fan now works as normal!
Have already ordered replacement just in case.
Cheers!

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Re: Xsara blower on (almost) full blast all the time

Post by GiveMeABreak » 17 Oct 2019, 15:14

It might be that the bearings are seizing due to moisture in the motor and not enough welly to kick start the motor when it starts off at slow speed. The atmospheric conditions / temperature may have helped it on this occasion. I would keep an eye on it, but if it starts happening more frequently you may need to intervene.

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Re: Xsara blower on (almost) full blast all the time

Post by AdieuHydropneumatic » 17 Oct 2019, 20:14

Hi Marc and thanks again.
The level of detail & knowledge you bring to this forum is only matched in my experience with AndersDK who helped me a great deal with my BX's back in the 2000's.
I see though that he has not been around for some time which is very sad.
I have a few more niggles with Xsara but will post when they become more problematic
Cheers

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Re: Xsara blower on (almost) full blast all the time

Post by GiveMeABreak » 17 Oct 2019, 22:50

Not a problem and thanks - it's all a team effort here - but glad you have found some of the advice useful 8-)

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Re: Xsara blower on (almost) full blast all the time

Post by myglaren » 17 Oct 2019, 23:06

It is a shame that Anders is no longer active, he was indeed a great help to many.

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Re: Xsara blower on (almost) full blast all the time

Post by Ben_W » 20 Oct 2019, 07:52

If you do end up with more fan issues, let me know.

I have a whole fan unit I took from a VTS I broke recently on which ive replaced the resistor pack. It's sat in a box of parts in my garage as a spares part.