[s-cars] 93 urS4: high speed fan and AC questions

Wed Sep 18 07:46:55 EDT 2002

Earlier, Bjørn Ødegård wrote:
>
> Okay.. I've asked the list before w/o results, so I'm not very
> optimistic! Seems that beer and rants about British cars are more their
> cup of coffee.. ;o))
> Maybe I'll spot it when I do my overdue timing belt!
>
> Bjorn  :o)
> '92 S4

I think you are asking about the large resistor with 3 or 4 large wires,
that is used for radiator fan speed control.  If this is in the same
place as the '86 to '89 Audi 200, then it is on the outside of the
front frame extension.  It's the part of the unit body frame that holds
the left side of the bumper, out in front of the wheel.  I think the
resistor is behind the inner fender well liner, bolted onto the outside
of the frame.

I don't know how you get at it.  I don't know if you can reach it
from inside the engine compartment, there will be a lot of things
in the way.  Perhaps you can get behind the fender well liner from
underneath, then you should be able to see it.

When you figure how to get to it, please let us know.

    - Charlie

  Charlie Smith   charlie at elektro.cmhnet.org  614-471-1418
  http://www.elektro.com/~charlie      Columbus Ohio   USA
  http://www.elektro.com/~audi     photos & technical info

  95 S6 Quattro  -  24 PSI, RS2 6 speed, and other features
  96 Dodge Ram   -  30 PSI, w/Cummins turbo diesel

>
> ----- Original Message -----
> From: "Martin, Gary G" <MartinGG at aetna.com>
> To: "'Bjørn Ødegård'" <beernuts at online.no>; "AUDI S Cars Discussion
> List" <s-car-list at audifans.com>
> Sent: Wednesday, September 18, 2002 12:08 AM
> Subject: RE: [s-cars] 93 urS4: high speed fan and AC questions
>
>
> Good question. I don't know where it is. The used car dealer I bought my
> car
> from did the replacement. He said it was very well hidden and he (if he
> is
> to be believed) said they had to take a lot of things apart in the front
> end
> to get at it. It probably is well hidden, cause I have never spotted it
> while working in the engine bay. Maybe somebody on the list
> knows.....listers?
>
> Gary
>
> -----Original Message-----
> From: Bjørn Ødegård [mailto:beernuts at online.no]
> Sent: Tuesday, September 17, 2002 8:08 AM
> To: Martin, Gary G
> Subject: Re: [s-cars] 93 urS4: high speed fan and AC questions
>
>
> Hi!
> If the defective resistor was on your S4, where was it located?? I can't
> find mine! I think mine might be busted as well..
>
> Regards,
> Bjorn  :o)
> '92 S4
>
>
> ----- Original Message -----
> From: "Martin, Gary G" <MartinGG at aetna.com>
> To: "AUDI S Cars Discussion List" <s-car-list at audifans.com>
> Sent: Tuesday, September 17, 2002 4:57 AM
> Subject: RE: [s-cars] 93 urS4: high speed fan and AC questions
>
>
> > What is your temperature gauge doing? I know for a fact that if the
> coolant
> > temp gets high enough, the AC will shut down. My problem was related
> to a
> > failed fan resistor block, which controls fan speed. Acted just as
> your
> > symptoms indicate. I don't remember if the fan came on at low speed,
> but in
> > stop and go traffic, temp went up, AC shutdown.
> >
> > Gary
> > 94 UrS4
> > 91 200 TQA
> >
> > -----Original Message-----
> > From: Eric Billing [mailto:eric.billing at eds.com]
> > Sent: Monday, September 16, 2002 10:37 PM
> > To: S-Car-list
> > Subject: [s-cars] 93 urS4: high speed fan and AC questions
> >
> >
> > Thinking two separate problems here... but thought I'd ask anyway.
> >
> > 1) during recent heat wave here in Mpls (95+ on 9/7) I noticed that
> the high
> > speed fan never came on. Waited about 10 minutes to get through a
> Dairy
> > Queen drive through on this hot day... still no high speed fan.  At
> home I
> > did a comparo with the wagon, just idling... about 10 minutes and the
> > wagon's fan goes high speed. Swapped relays with the wagon---which
> seemed to
> > confirm that this was not the problem. Earlier this spring, the wagons
> fan
> > was "stuck" on high speed all the time. New switch (lower driver side
> of
> > radiator) cured that. Me thinks the same switch is bad on the S4-only
> this
> > time its stuck on off vs. on. Make sense?
> >
> > 2) Also on the S4, I've noticed a few times during very hot days that
> the AC
> > just doesn't cool well. In stop and go traffic, I've noticed it
> shutting
> > itself down---even the icicle symbol on the control unit turns off and
> on by
> > itself. These cycles last 10-15 seconds or longer. When back to
> highway
> > speeds, the auto off/on cycling goes away and it appears that things
> are
> > acting normally---however, I must admit that overall cooling is
> lacking.
> > Then again, I have a black interior on the S4, where the wagon is
> grey...
> >
> > So, independent or related? If the high speed fan never comes on, does
> the
> > AC have some sort of auto shutdown mode to avoid excessive load?
> >
> > Thanks in advance for your ideas.
> >
> >
> > Eric
> >
> >
> > --
> >
> > Eric Billing
> > Eagan, MN 55123
> >
> > 1993 100csqw
> > 1993 urS4
> >
> > mailto:eric.billing at eds.com
> >
> >
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--

 Charlie Smith   charlie at elektro.cmhnet.org  614-271-1418
 http://elektro.cmhnet.org/~charlie/  Columbus Ohio   USA
 SMS: charlie.sms at elektro.com