scirocco heater controls

[flaatr@yahoo.com (Euroroc II)]

Check the second line going to the heater core, in about the same location 
as the valve. This is a metal coupling and they have a tendency to corrode 
and plug up... replace with a plastic one if it is.

-RGK

At 05:43 PM 11/24/02 -0700, you wrote:
>I found the temp valve by the master cylinder and the cable was attached. I
>had my wife move the lever back and forth to verify operation and it
>appeared to be moving the valve lever with no problems. I even pushed the
>valve lever (where the cable is attached) a little further with a screw
>driver to get it to its max open position. I warmed the car to operating
>temp and it still blows luke warm air. Do you think the valve itself may be
>broken inside?
>
>-----Original Message-----
>From: Euroroc II [mailto:flaatr@yahoo.com]
>Sent: Sunday, November 24, 2002 1:37 PM
>To: snowfish@attbi.com; scirocco-l@scirocco.org
>Subject: Re: scirocco heater controls
>
>
>You have two separate problems here... the heat is controlled by a push /
>pull cable that goes from the lower slider to a valve in the engine
>compartment near the firewall and around the brake MC. there is a metal
>clip that keeps the outside part of the cable that hold it in place and the
>wire inside is connected to the control lever and to the valve lever,
>respectively... if the clips are missing then the cable does nothing and
>you are stuck at whatever position you left it at, in your case cold.  Look
>for missing clips on the valve assembly and on the bottom HVAC control.
>
>You can try to move the one on the valve by hand and you should get warm
>air.
>
>As for where the air comes from this is controlled by a vacuum switch and
>vacuum solenoids... There are two 2 position valves and one 3 position
>valve. If it is stuck in Defog then all the valves are at their default
>position and that means the vacuum selector is not working... There are two
>reasons the selector does not work... one is that it is bad and two is
>there is no vacuum.
>
>Diagnose the problem starting from the source. Look for a T fitting near
>the fire wall on the passenger side with one hose leading to a check valve
>(half blue and half black in line deal)... the other end of the valve
>should go into on of the two spigots that come off the side of the fresh
>air / recirculate flap thingy in the rain try under the rain cover. This
>valve is notorious for plugging up... just remove the valve and reconnect
>the hoses, you may need to temporarily use a longer hose. If everything
>works then replace the valve. this valve just keeps the HVAC system
>isolated from the rest of the engine vacuum so if you shut down the engine
>your flaps stay where they once were... it is safe to drive without it.
>
>If the vacuum check valve is working go to the vacuum switch on the HVAC
>control. Set for fresh air or anything other than defog and start pinching
>off the other hoses till you hear the flaps moving. This should help you
>isolate which solenoid is leaking. The one that controls the fresh air
>vents and defog is a 3 position valve, 2 hoses go too it and is easily
>accessible thru the dash with the instrument cluster removed. there one in
>the  recirculate /  fresh air thing and this is accessible from the rain
>tray and there is a third on the right side of the center console located
>below the 3 position valve.
>
>Good luck
>
>-RGK-
>
>At 09:27 AM 11/24/02 -0700, snowfish wrote:
> >HI all,
> >
> >The heater controls have stopped working in my 87 16v rocco. Both the
> >position and temp controls do nothing.
> >Can anyone give me a good starting point? The levers slide back and forth
> >ok, but nothing happens. Only cool air blows and its stuck in defrost
> >position.
> >
> >TIA,
> >
> >Ian
> >87 16V rocco
> >Arvada, CO
> >
> >
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> >Scirocco-l@scirocco.org
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>
>
>
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