1999 xsara heater blower not working at all

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kevkane87
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1999 xsara heater blower not working at all

Post by kevkane87 »

Hello

My heater blower is not working. I hadn't used the car in a while as I was traveling abroad and when I came back the blower was not working at all.

I checked the fuse and it is fine. I also checked the relay and it appears to be working as I can hear the clicking noise. I also checked the voltage across the blower motor and it is zero which indicates the fault lies somewhere else.

On reading the haynes manual, the wiring diagram shows there is a resistor and a rheostat in the circuit but from what i've read, if there is a fault with this the blower would still work but only on one speed.

Do you have any ideas what the problem may be and how i can fix it?
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Post by citroenxm »

Sounds like the "Normal" Transister problem!

Xantias suffer the same!

What WILL have happened is the Transister board will have given up...

It is located ON the Blower board. Remove the under dash trim on the passenger side, towards the left side, locate a 5 pin plug with 5 rather thick wires going to it, this is the blower motor. Its screwed in by 3 screw head screws, NOT Torx...

May be best to lie on your back and look up with a torch.. Unplug the 5 pin plug, and the small Black flying lead, remove the 3 screws and drop the blower out...

You'll need to replace the transister board, of which theres been oneor two on Ebay lately..

The transister board is removable on its own, after pulling the motor out.

Paul
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kevkane87
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Post by kevkane87 »

Thanks very much paul. much appreciated. I will give it a go
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Post by spider »

Slightly off topic but can anyone post a picture of this board at some point please ?
Andy.

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Post by VertVega »

spider wrote:... can anyone post a picture of this board at some point please ?
Narrow view from top.
Image

Control module (heat sink and 2 transistors).
It is fixed with two screws to the blower body.
Image
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Post by citronut »

dont some maybe non aircon XSARA's have the coiled wire type of resistor pack in the heater air intake ductting,

regards malcolm
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Post by RichardW »

They do Malcolm, ad there is a thermal fuse on them that can just fail open circuit without warning, giving no power to the blower. The usual failure with the transistors is blower on uncontrollable full speed - that's not to say that they couldn't fail such that the blower stops working altogether!
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Post by VertVega »

Above pics were from my car but this one is not.
I guess this is the thermal fuse/resistor pack from non aircon version.

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Post by Clogzz »

When the fuse blows, only the top speed still works.
The fuse is 170°C or close.

Image


post a picture of this board
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Last edited by Clogzz on 15 Oct 2010, 14:53, edited 1 time in total.
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Post by RichardW »

Hang on a mo - are we looking in the wrong place? Is the heated rear window working? Pretty sure these are wired the same as the Xantia with the ignition switch taking the full load. If it's not been used a bit of corrosion may have built up on the contacts causing them to fail totally. If this is so, then the HRW will not work either.
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Post by spider »

Thanks for pics. I was just interested to see what it was, with the view to suggesting something could be made, but that's not going to be that cheap to do given the heatsink and power transistors, then there's the problem of a 'home made' replacement fitting properly too.
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Post by VertVega »

I was searching FCF and found this excellent How_to_Guide sent by CitroJim:
--> Blower Transistor Replacement Guide In Pictures 8-)

and at the end of that same thread there is also a link to the thread where the problem was the ignition switch related.
I think this is what RichardW is pointing as another possible cause of the blower problem.
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kevkane87
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Post by kevkane87 »

I managed to solve the probem today.

First of all, I checked the rear window heater which which is powered through the blowers relay. It was working fine so I moved on to check the transistor pack.

I made sure the problem was with the transistor pack by checking for an input voltage to it via the 4 pin plug paul was taking about. A voltage was present so this is where the problem was.

I then took out the blower and seperated the transistor pack from it. I tried a few scrap yards to see if I could get a replacement but had no luck.

When I got home, with the transistor pack still seperated from the blower, I plugged the connections all together again and started to check the voltages on the transistor pack. While I was doing this, the blower suddenly jumped into action. It frightened the life out of me to be honest.

I then cleaned all the connections and fitted everything back together. The blower is now working fine on all speeds.

I think the problem for me was that as the car was sitting doing nothing for months while I was abroad, the electrical contacts on the transistor pack may have corroded a bit or became dirty. All it needed was a good clean.

I just hope now it continues to work well. At least I know if it breaks again where the problem is.

Thank you everyone for your help. much appreciated
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heater blower

Post by mred »

i have the same problem hrw still works but not the blower , the car is in consant use . is the layout still the same my car is a pre facelift 2001 on an x plate thnx
miked
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Post by miked »

Not sure if it's the same on your car.

However one thing not mentioned above is that refering to the picture posted by clogzz,
Image If you click the pic in his post it gets bigger.
The text for the bit arrowed reads something like this leg must touch the heatsink below. Once when my blower stopped the bad connection was there. As soon as I touched that bit of metal it it sprang back into life.
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