[V8] Heater/defroster flap motor.

[Ron Wainwright]

Dave, The "controll box" is affectionatley called the AC Programer.... & surley is the same as the 5k/200's. Bolted to the right hand side near the glove box. 
There are indeed vacume servos in there that will go bad. The likleyhood of a vacume line being broke VS one of the solenoid valves being bad is not likley.

 If Rich is haveing trouble with the def/heater flap I suggest he look @ the flap motor, which is screwed into the drivers side of the blower box.
There is NO "controll box"...aka AC Programer on the 92-94 V8's.... it's the same system as in the C4 cars.

Ron


--- On Thu, 12/11/08, Dave Saad <dsaad at icehouse.net> wrote:

> From: Dave Saad <dsaad at icehouse.net>
> Subject: Re: [V8] Heater/defroster flap motor.
> To: "v8audi Fans" <v8 at audifans.com>
> Date: Thursday, December 11, 2008, 10:42 AM
> You are talking about the temperature regulator motor which
> is indeed  
> electric and mounted under the hood.  The original problem
> stated by  
> Rich though was the heat/defrost flap motor which on my
> '91 is a  
> vacuum motor controlled by a bunch of solenoid valves in a
> control  
> box near the glove box. I am pretty sure this is the same
> control  
> unit used on lesser models, maybe all the way back to the
> 5000.  It  
> is a Delco part and may also be available from a GM dealer
> if any  
> still exist....
> 
> My plan of attack on this would be:
> 1. verify vacuum supply from supply tank is good. There is
> a check  
> valve in there somewhere too.
> 
> 2. use the diagnostic mode to operate the flap motor. If it
> fails to  
> move, check for vacuum at the motor. If it is present then
> the motor  
> is stuck or broke. If not, the solenoid valve is either bad
> or it i  
> not being "told" to turn on/off. That leads to
> either a wiring  
> problem or broken valve control unit or broken control head
> (the part  
> with the LED readout and buttons)
> 
> My money is on a broken vacuum line under the hood - and
> actually  
> none of the vacuum motors work.
> 
> Dave
> 
> On Dec 11, 2008, at 6:36 AM, kneale at coslink.net wrote:
> 
> > I thoutht all the V8s were like the 200q20vs that have
> the electric  
> > motor
> > on the driver side of the heater core box.
> >
> > Look for a bunch of Phillips head screws holding a
> cover onto the  
> > box.  You
> > need to remove the wiper linkage to get access to all
> the screws.   
> > First
> > one of those motors I got was about $60.  Last one was
> over $80.
> >
> > Original Message:
> > -----------------
> > From: Dave Head v8q at bellsouth.net
> > Date: Wed, 10 Dec 2008 22:03:24 -0500
> > To: dsaad at icehouse.net, V8 at audifans.com
> > Subject: Re: [V8] Heater/defroster flap motor.
> >
> >
> > I can't remember - I know the 92 up cars went to
> electric motors  
> > for the
> > other motors. You can go into the diagnostics and
> operate them...
> >
> > Dave Saad wrote:
> >> If I remember right, it is a vacuum motor - so the
> motor itself is
> >> easy to test if you can expose the tube that goes
> to it.  Maybe the
> >> best place to do that would be the vacuum switch
> module which is
> >> mounted up around the glove box.
> >>
> >> I think there is a diagnostic mode for the climate
> control system too
> >> - where you can step through all the functions and
> watch for things
> >> to move.
> >>
> >> Before you get too carried away though, have you
> looked for broken or
> >> loose vacuum lines?
> >>
> >> Dave
> >>
> >>
> >> On Dec 10, 2008, at 6:49 PM, Rich Ehlert wrote:
> >>
> >>> Hi all.
> >>> I am having trouble with my heater/defrost
> flap motor.  Has anyone
> >>> had any
> >>> experience with getting that thing to work?
> >>> Thanks,
> >>> Rich
> >>> '93 V8
> >>>
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