Re: HVAC saga continues, '875kcstq

["Graydon D. Stuckey" <graydon@apollo.kettering.edu>]

On Mon, 21 Dec 1998, Evans, Nicholas wrote:

> car cold in the morning, the system maintains whatever temperature
> setting (IE, cable/flap position) it was in when I shut it off the night
> before, regardless what temperature I punch in on the dash (does go into
> defrost mode when I punch defrost, but temperature is still not
> regulated).   After about 20 miles, I can hear the little motor begin to
> hum; the flaps move, and the temperature begins to be regulated.  At

Have you checked the diagnostics for the HVAC control head?   There are 
two channels in particular that you need to look at.  The first is the 
one that tells you what position the HVAC system is telling the temp door 
to go to, and the second is the actual position that the temp door is 
at.  These should be the same, and presumably, first thing in the morning, 
they should be at full hot.

If they are both the same and at full hot, then check the Bowden cable
that goes to the temp door, for binding.  It is cheap to buy and easy to
install if you find it is failing. 

HTH

Later,
Graydon D. Stuckey
No Audis!  :-(
Yet!  :-)