Heater blower issue

urquattr085 · 22-04-17, 06:58 PM

Hi all.

Apologies if this has been covered in the past, couldn't see anything exactly relating to my problem.

The 1st speed on my heater blower doesn't work. (1985 quattro). Speeds 2 & 3 work fine.

According to my wiring diagram, the first speed feed from switch to fan ballast resistor is a white wire and I have 12v at the resistor end with fan switched to 1 and ignition on.

Could anyone please confirm my suspicions of a faulty ballast?
If so, any ideas for sourcing a replacement?

The only ones found so far are on a certain auction site secondhand with no guarantee they are fully functional.
Part code is 171 905 051B

Many thanks in advance.

SorenR · 23-04-17, 12:19 AM

Quote:

Originally Posted by urquattr085

Hi all.

Apologies if this has been covered in the past, couldn't see anything exactly relating to my problem.

The 1st speed on my heater blower doesn't work. (1985 quattro). Speeds 2 & 3 work fine.

According to my wiring diagram, the first speed feed from switch to fan ballast resistor is a white wire and I have 12v at the resistor end with fan switched to 1 and ignition on.

Could anyone please confirm my suspicions of a faulty ballast?
If so, any ideas for sourcing a replacement?

The only ones found so far are on a certain auction site secondhand with no guarantee they are fully functional.
Part code is 171 905 051B

Many thanks in advance.

Check the switch... The same switch is used for wifes Golf I Cab. The Cab is eating them for some reason - they get warm and melt. Fan not working in my WR for the same reason. Fan and switch temporarely donated to wife's car... New parts still in boxes waiting for temperature to go up.

VWHeritage is sold out on both switch and resistor... (171 971 281E replaces 171 905 051B)

https://www.vwheritage.com/171971281...ss-mk1-golf-je

urquattr085 · 23-04-17, 09:26 AM

Hi and thanks for the reply.
Switch is fine, tested for output on all 3 speeds ok so I know this is good.

Ringmaster · 06-09-17, 10:16 PM

Hi,

Did this get sorted in the end?

I have similar problem with my 87 C3. 1st speed is very slow. Hardly noticeable.

Is the Resistor easy to get at and is it yellow?

urquattr085 · 07-09-17, 08:43 PM

Hi Ringmaster,
Yes got this sorted thanks by replacing the ballast.
On the B2's, it is under the scuttle water tray, remove the mesh leaf guard and you will see it attached to the fan motor.

Mine was white, replacement which I had to have secondhand and shipped from the States was simple enough if you are happy to splice the wiring.

Example item in link below
http://www.ebay.co.uk/itm/Blower-HVA...8AAOSw791Zrxci

C3 looks to be a different part on ETKA, screwed to the side of the fan motor. Possibly part no. 443959127C or ending in B if the car has aircon.
Hope this helps.

Ringmaster · 07-09-17, 10:59 PM

Thanks urquattro085,

Certainly a useful pointer.

ovalking · 08-09-17, 08:07 AM

Quote:

Originally Posted by Ringmaster

I have similar problem with my 87 C3. 1st speed is very slow. Hardly noticeable.

Is the Resistor easy to get at and is it yellow?

Yes, it's the yellow thing screwed into the side of the blower housing in front of the windscreen.
Fan position 1 is feeble on my car too.
Ventilation on these cars is poor.

Ringmaster · 08-09-17, 10:26 AM

Thank you Ovalking.

That saves me a bit of time locating it.

My fan speed at 1 is slower than I can ever remember.

23-04-17, 09:26 AM	#3
urquattr085 Senior Member Classic Audi Club Member Join Date: May 2016 Location: Displaced Northerner in Essex Posts: 1,528	Hi and thanks for the reply. Switch is fine, tested for output on all 3 speeds ok so I know this is good. __________________ 1985 WR quattro 2010 A6 3.0Tdi Allroad 2010 A3 1.4 tfsi Sport - Sold but still in the family 1984 80 Quattro - Sold many moons ago 1981 Coupe GT - Sold to buy above

07-09-17, 08:43 PM	#5
urquattr085 Senior Member Classic Audi Club Member Join Date: May 2016 Location: Displaced Northerner in Essex Posts: 1,528	Hi Ringmaster, Yes got this sorted thanks by replacing the ballast. On the B2's, it is under the scuttle water tray, remove the mesh leaf guard and you will see it attached to the fan motor. Mine was white, replacement which I had to have secondhand and shipped from the States was simple enough if you are happy to splice the wiring. Example item in link below http://www.ebay.co.uk/itm/Blower-HVA...8AAOSw791Zrxci C3 looks to be a different part on ETKA, screwed to the side of the fan motor. Possibly part no. 443959127C or ending in B if the car has aircon. Hope this helps. __________________ 1985 WR quattro 2010 A6 3.0Tdi Allroad 2010 A3 1.4 tfsi Sport - Sold but still in the family 1984 80 Quattro - Sold many moons ago 1981 Coupe GT - Sold to buy above

06-09-17, 10:16 PM	#4
Ringmaster Senior Member Classic Audi Club Member Join Date: Apr 2008 Posts: 1,326	Hi, Did this get sorted in the end? I have similar problem with my 87 C3. 1st speed is very slow. Hardly noticeable. Is the Resistor easy to get at and is it yellow?

07-09-17, 10:59 PM	#6
Ringmaster Senior Member Classic Audi Club Member Join Date: Apr 2008 Posts: 1,326	Thanks urquattro085, Certainly a useful pointer.

08-09-17, 10:26 AM	#8
Ringmaster Senior Member Classic Audi Club Member Join Date: Apr 2008 Posts: 1,326	Thank you Ovalking. That saves me a bit of time locating it. My fan speed at 1 is slower than I can ever remember.