From C1J1Miller AT aol.com Wed Dec  9 10:25:52 1998
Date: Thu, 4 Jun 1998 10:57:49 EDT
From: C1J1Miller AT aol.com
To: quattro AT coimbra.ans.net
Subject: Subject: A/C Hot & Cold Vent Problem, 4kq

David wrote:
--------------
While running my A/C, cold air only blows out of the center vents, but
extremely hot air blows out of the side vents.  Any suggestions as to a
fix for this problem?

'85 4kq
------------------------------
This has been covered earlier this year, and is in the archives on the quattro
list homepage http://coimbra.ans.net/quattro.html.  That said:
your 4kq center vents only blow outside air (i.e., not through the heater
core).  The other side vents go through the core before entering the car.
Thus, your core is still getting coolant heated by the engine.  The valve that
adjusts the amount of hot coolant entering the heater core is located under
the coil, and is controlled by a cable.  My guess is that it is sticky, and
the cable either needs adjustment, or the valve needs cleaning/lubrication (or
replacement).  You can disconnect the wire clip holding the cable to the
heater control valve and adjust it so that the lever on the valve moves
entirely to cold when the inside control lever is so adjusted.  The clip is
stiff and difficult to reattach; I used a pair of pliers.  You may need to
readjust this clip semiannually; in spring to allow full cold, and in fall to
allow full warm.
HTH, chris miller, windham NH, c1j1miller AT aol.com
'91 200q      http://members.aol.com/c1j1miller/index.html

From HAREST AT Allenbrook.iix.com Wed Dec  9 10:25:56 1998
Date: Thu, 04 Jun 1998 15:48:24 -0400
From: HAREST AT Allenbrook.iix.com
To: mchang AT ece.nwu.edu
Subject: RE: Subject: A/C Hot & Cold Vent Problem, 4kq


    [ Part 1, Text/PLAIN  51 lines. ]
    [ Unable to print this part. ]


The heater core is in the cabin - inside the heater box under the dash.
The evaporator for the A/C is below the glovebox in the cabin.
The heater valve is in the rear of the engine bay.

There radiator and condenser are in the left front corner of the engine
bay... ;-)

HTH!
-Stott

-----Original Message-----
From:   Mark L. Chang [SMTP:mchang AT ece.nwu.edu]
Sent:   Thursday, June 04, 1998 3:34 PM
To:     C1J1Miller AT aol.com
Cc:     quattro AT coimbra.ans.net
Subject:        Re: Subject: A/C Hot & Cold Vent Problem, 4kq

On Thu, 4 Jun 1998 C1J1Miller AT aol.com wrote:

> David wrote:
> --------------
> While running my A/C, cold air only blows out of the center vents, but
> extremely hot air blows out of the side vents.  Any suggestions as to a
> fix for this problem?
>
> '85 4kq
> ------------------------------
> core).  The other side vents go through the core before entering the
car.
> Thus, your core is still getting coolant heated by the engine.  The
valve that
> adjusts the amount of hot coolant entering the heater core is located
under
> the coil, and is controlled by a cable.  My guess is that it is sticky,
and



I have this same problem... was wondering if this "core" (excuse my
mechanical illiteracy) is the one near the center back of the engine
compartment or the one under the passenger side dash?  Or is that one
called something else?

Whoo-boy... now I sound *really* dumb!

BTW, anyone want to tell me how to read the wiring diagrams in the
Bentley?  Ugh...

mc

                    [PGP] finger mchang AT ece.nwu.edu



From C1J1Miller AT aol.com Wed Dec  9 10:26:15 1998
Date: Thu, 4 Jun 1998 16:46:58 EDT
From: C1J1Miller AT aol.com
To: mchang AT ece.nwu.edu
Subject: Re: Subject: A/C Hot & Cold Vent Problem, 4kq

In a message dated 98-06-04 15:34:21 EDT, you write:

> I have this same problem... was wondering if this "core" (excuse my
>  mechanical illiteracy) is the one near the center back of the engine
>  compartment or the one under the passenger side dash?  Or is that one
>  called something else?

The core is attached to the two coolant pipes running out of the engine
compartment; the other thing under the passenger side dash is for the A/C. (in
the engine compartment, there should be an aluminum pipe leading to the A/C
thingy...from memory)
 Again, don't own a 4kq any more; the bentley should show a good diagram under
the A/C section.

The part I'm talking about that's sticking is the simple valve that cuts off
coolant flow.  Couple inches long, plastic, with an arm connected to a wire,
located under the coil within the coolant line leading to the firewall; return
coolant line beside it.  

If you think your heater core is leaking, an easy test is to wipe your finger
along the windshield where it's likely fogging up above the defroster vents,
and touch your finger to your tongue.  If the antifreeze coolant mixture is
leaking, your finger will taste sweet.  Remember that antifreeze is poisonous;
however, the slight amount on your finger is entirely harmless.  I've heard
that the heater cores do go after a while; never had to replace mine.  I
remember reading a post on replacement in the archives a while back, search
away.


To: mtwigg@fdpcorp-boston.com
Cc: quattro@coimbra.ans.net
Subject: Re: 4kcsq vents only blow hot

Check the heater valve at the firewall, which is where the cable
coming off your temp lever ends.  Odds are it's stuck in the hot
position.  Part should be under $20.
-- 
Dan Simoes                                dans@ans.net
ANS Communications	 	http://coimbra.ans.net/dans.html
100 Manhattanville Road                 (914) 701-5378 (voice)
Purchase, NY 10577                      (914) 701-5310 (fax)

From conner@cfm.ohio-state.edu Wed Dec  9 10:37:22 1998
Date: Tue, 30 Jun 1998 14:45:12
From: Dave Conner 
To: quattro@coimbra.ans.net
Subject: Re: 4kcsq vents only blow hot

>Dan Simoes wrote...
>Check the heater valve at the firewall, which is where the cable
>coming off your temp lever ends.  Odds are it's stuck in the hot
>position.  Part should be under $20.

There is a spring clip attaching the control cable to the valve.  The clip
acts as an adjustment.  If it secures the cable at the wrong spot the valve
will either not open or not close fully.  It doesn't have to be open very
far to result in hot air all the time.

Dave Conner