electrical problem

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bob watkinson - 15 Aug 2004 15:49 GMT

All of a sudden my heater fan has stopped working on speeds 1, 2 and 3
though it works on 4. Is this a faulty switch and is replacement difficult?
or is there wiring common to the three speeds but not the fourth?

Thanks guys

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Thomas Edwards - 15 Aug 2004 16:25 GMT

> All of a sudden my heater fan has stopped working on speeds 1, 2 and 3
> though it works on 4. Is this a faulty switch and is replacement difficult?
> or is there wiring common to the three speeds but not the fourth?
>
> Thanks guys

I'm no expert on pugs in particular, but his sounds like a resistor pack has
blown (1,2,3 are fed through a resistor to slow the fan 4 is direct feed)

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bob watkinson - 15 Aug 2004 17:42 GMT

Thanks Thomas. Sounds like a garage job then . Do you think it will be
expensive?

> > All of a sudden my heater fan has stopped working on speeds 1, 2 and 3
> > though it works on 4. Is this a faulty switch and is replacement
[quoted text clipped - 5 lines]
> I'm no expert on pugs in particular, but his sounds like a resistor pack has
> blown (1,2,3 are fed through a resistor to slow the fan 4 is direct feed)

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Thomas Edwards - 16 Aug 2004 08:10 GMT

> Thanks Thomas. Sounds like a garage job then . Do you think it will be
> expensive?

It depends on the model, if the resistor pack is easily acessable under the
bonnet, thaen the only problem is getting parts, but if it is behind the
dash, it will be more compicated/costly

Someone else on this group will prob know this fault better than me!

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?var P?tur Gu?nason - 16 Aug 2004 10:10 GMT

Hi Bob
Tom is correct in his diagnosis - the resistor is faulty.
You do not mention which Peugeot you have, but I have changed the resistor
on 406 and 605. Both are quite easy.
Remove the panel above the front passenger footwell, and you should see the
heater blower motor. A black (?) box fastened with 1 or 2 screws to the edge
of the motor mounting is the culprit. Loosen and remove plug - that's it.
The downside is that you are unlikely to get the resistor from anywhere else
then a Peugeot dealer.

IPG

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bob watkinson - 16 Aug 2004 13:24 GMT

Many thanks Ivar. Mine's a 206. I suppose it will be the same set up.

> Hi Bob
> Tom is correct in his diagnosis - the resistor is faulty.
[quoted text clipped - 18 lines]
> has
> > blown (1,2,3 are fed through a resistor to slow the fan 4 is direct feed)

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Dave English - 17 Aug 2004 14:46 GMT

>All of a sudden my heater fan has stopped working on speeds 1, 2 and 3
>though it works on 4. Is this a faulty switch and is replacement difficult?
>or is there wiring common to the three speeds but not the fourth?

On the 205 at least, the motor speed is controlled by a transistor
regulator, the switch connects different resistors to it for the
different speeds. For full speed though, the switch just short circuits
the transistor, because there is no need for it with its loss & heat
dissipation.

What you describe happens when the transistor fails, it is open circuit
so the fan does not run except when the fan is at full speed.

Again, on the 205 at least, the transistor is on a circuit board within
the fan assembly, it can be removed from below the fan and replaced.

Car buffs get a good board from a car scrap yard. Electronics buffs
instead replace the transistor with anything suitable.

For more details see earlier threads, such as:

<http://groups.google.com/groups?threadm=PYCCgtG%2B4C4%24oAM%24%40pillar.
turnpike.com>

Regards

Signature

Dave English,
405 Quasar 1.9D Estate, 205SR

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chris vine - 14 Apr 2005 17:28 GMT

Hi Bob,

I have exactly the same problem on a 206, heater not working on 1,2 or 3
but fine on 4.

I suspect the resistor bank but would like to know if you resolved the
problem and what it was??

I do not want to take the car to the dealer yet and be told that they had
to take out the dashboard etc etc and the bill is..... 1 million pounds!!!!

Many thanks in advance
Chris.

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