91 CQ - Adjust Temp Control Flap Potentiometer - How to Access

[Jeff Pereira]

Thanks for all the good info.
> 
How did you gain access to the unit ??  That is my biggest obstacle at
this point.

Jeff

 
> On Sat, 15 Jan 2005 12:34:55 -0800, Tony Lum <tlum at flash.net> wrote:
> > At 02:36 PM 1/15/2005 -0500, you wrote:
> > >Not having heat in the winter kinda sucks.
> > >It seems that I am going to need to adjust the temperature control
> > >flap feedback potentiometer.
> > >
> > >Does anyone know the best way to get at this part in order to do so.
> > >
> > >My Bentley (87.46) says to remove the center section of the instrument
> > >panel, but someone told me I can probably get to it by going in from
> > >under the dash on the dirver's side.
> > >
> > >Anyone BTDT ??
> > >
> > >TIA
> > >
> > >Jeff
> > >_______________________________________________
> > >quattro mailing list
> > >quattro at audifans.com
> > >http://www.audifans.com/mailman/listinfo/quattro
> >
> > Hi Jeff,
> >
> > Could be the motor in the temp controller.  I had a similar problem in my
> > Mom's '89 100 Avant.  The temp was stuck at cold.  I ran the diagnostics on
> > the CC and found that although the CC was receiving a signal from the pot,
> > it just wasn't moving.  Channel 01 was showing error 15 which meant that
> > the CC's output and pot were not tracking each other (the limit must be
> > within 3 units).  So I removed the unit, which is pretty easy in the
> > Avant,  and opened it.  Inside was a small electric motor a metal and
> > plastic gear train and the pot.  The brushes looked fine so I treated the
> > problem as if it was just another dirty R/C (radio controlled) electric
> > motor.  I flushed the motor with electric motor cleaner then put a couple
> > of commutator drops right on the brush assembly and then ran the motor
> > continuously for about 5 minutes in both directions.  The "comm drops" are
> > a R/C racers old tactic for increasing the power of the electric motor by
> > improving the contact between the brushes and the commutator.  I also used
> > the motor cleaner spray to flush the excess grease from the gear train then
> > lightly lubed the train and reassembled.  The temp controller's worked fine
> > ever since and no recalibration was required.  Comm drops and motor cleaner
> > spray are available at most hobbie stores that sell R/C cars and
> > parts.  Tower Hobbies (www.towerhobbies.com) is one of the biggest supplier
> > on the internet.
> >
> > HTH,
> >
> > --
> > Tony
> >
> > '80 5KS
> > 83 urquattro #900302
> > '85 4kq
> > '87 5kcstq
> > '87.5 coupe GT
> >
> >
>