Blower or internal heater Fan .Xantia 2.0 HDi

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jmd
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Blower or internal heater Fan .Xantia 2.0 HDi

Post by jmd »

The Blower or Internal heater fan rums at maximum, (full speed) no matter where the slider control is positioned. I have established (through an Electrical Engineer) that the Heater/dashboard Slider Control is working properly. Can anybody offer any advice here.
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Post by citronut »

this is exactly what mine is doing, even with the plug removed from the fan unit the live feed on the thick yellow wire stays powerd up untill i shut the engine off, no matter were i move the fan switch to including the off position,

regards malcolm
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Post by Toby_HDi »

IIRC this is due to a pair of transistors failing.

I remember seeing a guide on here somewhere to replacing them but cannot seem to find it.
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Post by CitroJim »

Here it is...

Please note I'm currently out of stock of transistors...
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Post by jmd »

Thanks Citronut :Tobi_Hdi & CitroJim, for your replies. That is a most useful diagram from Jim. I have a Citroen Xantia Mark2 (pre Hdi) from which I have removed the Fan/Blower & fitted it in my HDi tonight - all working perfectly. I will however be using your diagram Jim & repairing my faulty unit, as the price of a new unit is on the high side. Good Luck Citronut with your repairs. We have had the same problem, as mine was acting exactly like yours.
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Post by Clogzz »

out of stock of transistors
There are other transistors. :D
These MJ2955 are, I think, the PNP mates of the 2N3055.

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Post by citronut »

i have just orderd 4 MJ11015 from Farnells there order No. 1165917 at £3.73 each + VAT, they do actualy list three different quality's/price's

regards malcolm
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Post by CitroJim »

Clogzz wrote:
out of stock of transistors
There are other transistors. :D
These MJ2955 are, I think, the PNP mates of the 2N3055.
I'm only out of stick because I need to order some :oops:

Yes, spot on with the MJ2955. :D

Another possible alternative is the 2N6287.....
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Post by citronut »

your not the only one out of stock Sir Jim, i placed an order with Farnells tuesday, along with some bits my son required, the package turned up today with a note stateing they are curently out of stock,

also the package came from Belgium,

regards malcolm
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Post by CitroJim »

citronut wrote:the package turned up today with a note stateing they are curently out of stock
That's amazing Malcolm :shock: last time I looked they had a thousand or so in stock.

I can only assume a lot of Citroens have had blower problems this year :lol:

I'm not sure where else in the electronics industry they're used. High power audio amplifiers mainly as that was what they were originally designed for...
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Post by citronut »

what is the part No./order code of the ones you saw in stock Jim,

as i belive they do three diferent quality's/price,

the ones i orderd were order code 1165917=MJ11015

regards malcolm
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Post by Clogzz »

not sure where else in the electronics industry they're used
They may have gone to the backblocks of China, and will come back in primitive car battery chargers. :twisted:
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Post by HDI »

Check your pollen filter to make sure it isn't blocked, this will cause overheating.
Now using '00 Xantia LX HDI, pov spec :(
My past Citroens :-
'00 Xantia SX HDI, now dead due to accident :(
'99 Xantia HDI 110 Exclusive, RIP :(
'97 Xantia TD SX
'96 Xantia TD LX
'96 ZX TD
'89 BX TD
'88 AX GT
'79 CX2400 Pallas (scrapped :( )
& a couple of Peugeots !
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Post by citronut »

well they transistors turned up today 2nd class post from Leeds, the other part of our order turned up yesterday via UPS from Belgium,

as Jim found on there web site it lists over a 1000 in stock in the UK and 100 in stock in Belgium,

i think its a bit daft sendding two packages via diferent methods and from diferent countrys,

especialy as its free carridge,

also when i placed the order i asked for batched pairs, and was told they cant supply them as batched paires,

turns out all 4 are the same batch

regards malcolm
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Post by CitroJim »

Ahh, yes, using two from the same batch I regard as essential as the circuit has no current sharing arrangements, relying on the transistors themselves to be sufficiently well matched to effect reasonable current sharing.

All to save a couple of resistors :roll:

Pleased it all turned out OK Malcolm although as you say, some of today's logistics seem distinctly barmy to say the least.
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