I have found a better solution to a cable controlled heater valve.
Summit racing has a "Vintage Air" water valve which is electrically
controlled. It has a rheostat type switch and a black box which can be
hidden under dash.  Except for the mounting hole and hooking up 2 wires ,it
looks like it will slip right in place of the stock unit. While a little
pricey at about $100.00 delivered  ,If it stops the hot air flow in summer
it may just be worth it. I am going to double check my factory hot air
deflectors and be sure all stock parts are working first. Come the hot days
of summer I may just step up to the plate and buy one.
    In my 85 I had installed a 2nd valve under the truck and just turned it
off and on as the seasons changed and it worked as well. But having a
permanent fix may just be worth it.

                                          Stacy

On Sat, Jul 2, 2011 at 7:06 PM, Robert Stevens <mtbiker62@gmail.com> wrote:

> <
> http://gerry.vanagon.com/cgi-bin/wa.exe?S2=vanagon&L=vanagon&q=heater+valve&s=heater+valve&f=&a=March+2005&b=30+September+09
> >
> On Jul 2, 2011, at 7:52 PM, Gregory Smith wrote:
>
> > Hey gang,
> >
> > When fully closed, my heater valve still flows a little, enough to make
> > the warmth uncomfortable as we finally head into summer here in the PNW.
> > Is this by design, or does it mean the valve is faulty?  I have already
> > checked that the valve is closing fully, adjusting the wire sheath as
> > needed.
> >
> > Thanks,
> > Gregory Smith
> >
> > Smith Design Studio
> > Small Building Company
> > Olympia, WA
> > 360-239-0429
> > gregoryfsmith.com
>

--
   1989 Swedish Tristar with Aluminum gates and Atiwe 16" Wheels.
    Oldest son is an Eagle scout.