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Help with heater blower needed.

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The blower for my cabin heater has suddenly stopped. It's an '82 Lux, for reference, and there's nothing at all on 0,1,2, but it does come on at no.3, albeit a lot slower than it used to be.
I presume it's a fuse or resistor, something simple like that but i don't have an owners or workshop manual to hand to show me where said culprits may be.
So, do you think my diagnosis is correct or could it be something else? And if I'm right, can you direct me to the fuse or resistor?
Thanks chaps.
 
Hi Darren,
I`ve got the same problem with my `82 model, and yes, it`s the resistor thats at fault.To get at it you have to remove the motor cover,( centre top of bulkhead with bonnet raised).It`s held down with mastic and is freed by cutting the mastic with a stanley knife and lifting it off. The resistor sits on top of the motor and is just clipped in place. It comes with its own loom which unplugs.It should be a moments work to change it.
However, finding a replacement is proving difficult, I`ve been phoning around without success, but have some part nos.
Bert Gear tells me its 47797281 and the PET (porsche part microfiche) gives it as 477971282 but thats for MY `83.
Bert is sure its the same as mk1 and mk2 VW Golf, so next stop is the breakers yard as I think its been discontinued.
Hope this helps,
jr.
 
Thanks JR. I've been out to look at the item you're on about (very good description, thanks a lot). A tube shaped resistor about 3 inches long, yeah? I've cleaned it up a bit and given it the customary spraying with WD, but to no avail. I have found though that it does get alarmingly hot, hot enough to start to melt the plastic cover. So that MUST be the culprit then.
Same as a Golf eh? I'll get looking. Should be a cheap repair then. I bet the Porsche one is £60 while the VW item will be £6!!

Cheers JR. It's nice to get peoples support and advice.
 
Hi Darren,
Curiously parts that are VW in origin are more expensive from VW than Porsche in some cases owing to an agreement between the two companies.
glad you found the info useful.
jr.
 
Sorry to be old-fashoned here, but if someone knows the spec of the resistor (resistance and power ratng) you could probably get one from Maplin/RS for pennies.
So, anyone know the specs (if they aren't written on it), or anyone volunteering to go and measure the resistance of the resistor in their operational car? (I'm not - it's dark and cold and rainy and I've got a headache!)


Oli.

ETA: But I will if you REALLY want me to next weekend.
 
Is it this part in the pic?If so i cleaned mine up by partially soaking it in clear vinegar last year as it wouldn't blow at all.
It did the trick ok and works fine now.
 
No that's not it at all. Is yours a later model?
Mine sits on top of the actual fan, is three inches long, cylinder shaped, solid (I am talking about the resistor here) and has four wires coming out the top, all about half an inch apart.
I've tried cleaning it but it's no better. I might try again though.
Thanks anyway.
 
ORIGINAL: 944cabby

Is it this part in the pic?If so i cleaned mine up by partially soaking it in clear vinegar last year as it wouldn't blow at all.
It did the trick ok and works fine now.
Click to expand...
That looks like a headlight ballast resistor. (Never worked out why you need one, but apparently they are necessary on VW's at least, and therefore are probably fitted to 944's, although come to think of it I have never seen one on my S2.)


Oli.
 
ORIGINAL: zcacogp

ORIGINAL: 944cabby

Is it this part in the pic?If so i cleaned mine up by partially soaking it in clear vinegar last year as it wouldn't blow at all.
It did the trick ok and works fine now.
Click to expand...
That looks like a headlight ballast resistor. (Never worked out why you need one, but apparently they are necessary on VW's at least, and therefore are probably fitted to 944's, although come to think of it I have never seen one on my S2.)


Oli.
Click to expand...
No it's nothing to do with the headlight, its for the blower and situated on the fan housing held in with a couple of screws and has an electrical connector attatched.
 
I've been having a similar problem with my heater - albeit in reverse. Speeds 1 and 2 work fine. Speed 3 works as it should but the fuse gets really hot and starts to stink out the cabin. Could this also be resistor related? I thought the resistor only affected speeds 1 and 2 but info in this area is pretty non-existant - even in the official boxed Porsche workshop manuals that came with my car.
 
Hi Paul, Thanks for the lead to porschapart. Darren is right about the appearance of the resistor.Oli`s suggestion of Maplins is a good one providing you have a soldering iron.I think I`ll be ringing porschapart as its less hassle.
jr
 
ORIGINAL: jr

Hi Darren,
Curiously parts that are VW in origin are more expensive from VW than Porsche in some cases owing to an agreement between the two companies.
glad you found the info useful.
jr.
Click to expand...
Could be worst i bought a blanking cover for my 944 from a porsche dealer,it came from the factory sealed in a bag with the porsche part number sticker on it,imagine my surprise when i took it out of the bag to find that it had FORD stamped on the back of it !!!
 
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