Classic Audi » Technical » Mech/Tech » Electrical problems » Heater blower issue

Reply
 
Thread Tools Display Modes
Old 22-04-17, 06:58 PM   #1
urquattr085
Grown up member
Classic Audi Club Member
 
urquattr085's Avatar
 
Join Date: May 2016
Location: Displaced Northerner in Essex
Posts: 806
Default Heater blower issue

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.
__________________
1985 WR quattro
2010 A3 1.4 tfsi Sport - Sold but still in the family
1983 80 Quattro - Sold many moons ago
1981 Coupe GT - Sold to buy above
urquattr085 is offline   Reply With Quote
Old 23-04-17, 12:19 AM   #2
SorenR
Grown up member
 
SorenR's Avatar
 
Join Date: Oct 2010
Location: Greater Køge area, Denmark
Posts: 516
Default

Quote:
Originally Posted by urquattr085 View Post
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
SorenR is offline   Reply With Quote
Old 23-04-17, 09:26 AM   #3
urquattr085
Grown up member
Classic Audi Club Member
 
urquattr085's Avatar
 
Join Date: May 2016
Location: Displaced Northerner in Essex
Posts: 806
Default

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 A3 1.4 tfsi Sport - Sold but still in the family
1983 80 Quattro - Sold many moons ago
1981 Coupe GT - Sold to buy above
urquattr085 is offline   Reply With Quote
Old 06-09-17, 10:16 PM   #4
Ringmaster
Grown up member
Classic Audi Club Member
 
Ringmaster's Avatar
 
Join Date: Apr 2008
Posts: 911
Default

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?

Ringmaster is offline   Reply With Quote
Old 07-09-17, 08:43 PM   #5
urquattr085
Grown up member
Classic Audi Club Member
 
urquattr085's Avatar
 
Join Date: May 2016
Location: Displaced Northerner in Essex
Posts: 806
Default

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 A3 1.4 tfsi Sport - Sold but still in the family
1983 80 Quattro - Sold many moons ago
1981 Coupe GT - Sold to buy above
urquattr085 is offline   Reply With Quote
Old 07-09-17, 10:59 PM   #6
Ringmaster
Grown up member
Classic Audi Club Member
 
Ringmaster's Avatar
 
Join Date: Apr 2008
Posts: 911
Default

Thanks urquattro085,

Certainly a useful pointer.

Ringmaster is offline   Reply With Quote
Old 08-09-17, 08:07 AM   #7
ovalking
Grown up member
Classic Audi Club Member
 
Join Date: May 2009
Location: Ipswich
Posts: 248
Default

Quote:
Originally Posted by Ringmaster View Post
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.
ovalking is offline   Reply With Quote
Old 08-09-17, 10:26 AM   #8
Ringmaster
Grown up member
Classic Audi Club Member
 
Ringmaster's Avatar
 
Join Date: Apr 2008
Posts: 911
Default

Thank you Ovalking.

That saves me a bit of time locating it.

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

Ringmaster is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT. The time now is 11:45 AM.

Powered by vBulletin®
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright ©2007-2008 Classic Audi | Site by Roadrunna