[Biturbos4] Lack of heat in B5 series car - any thoughts? (common problems, etc)

Mark R speedracer.mark at gmail.com
Mon Dec 24 06:54:33 PST 2007

We have a GLX (AWD, V6) as a company car for our VP (purchased new).  Great
value as it's a total Audi drivetrain.  The FWD versions seem to have more
differences (suspension, etc.).  Our 2001 is about to get replaced.  It's
been stellar, but it's around 200K miles now!  My mother's BMW 330xi will
likely become his new car as she wants something bigger.

The climate control head should be scannable with VAG-COM.  If there's a
stepper motor failure, it'll surely turn up there.  And that's where you
should start the diagnosis.

When he changes the cabin air filter, it would be a good opportunity to
check for debris (leaves, dead rats) as well.

Mark Rosenkrantz
('87 4KCSQ, '00 S4, and a bunch of other toys)
On Dec 24, 2007 9:10 AM, Grant Lenahan <glenahan at vfemail.net> wrote:

> OK, its a Passat. and it isn't even mine.
> But a friend, who's a pretty fair mechanic, just bought a 2001 Passat
> for his son.  It should be very similar to B5 A4s and S4s in this
> regard, I assume.
> One problem is that the heat doesn't work - it blows stone cold air
> (I'm told).  They know the history of the car, and the owner says it
> was working normally one day, and totally gone the next. We suspect a
> mixture (cold/warm air) stepper motor died or a connection to it has
> a problem.  But i've not heard many complaints about this.
> Any wisdom? Common problems?  Things to check? Warnings?
> Thanks much,
> Grant
> ps: apologies if this arrived twice. It got caught in moderator
> approval land and never emerged - or not so I saw.
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