Re: e6941tb@ix.netcom.com

[DeWitt Harrison <de@aztek-eng.com>]

On Wed, 08 Oct 1997 20:15:37 -0700, Igor Kessel wrote:

>[ ... ]
>BTW, I have also installed an all-metal heater valve and the SOB does not
>close completely (it blows warm air on a 20°C day with the CC set on 20°C
>in the *econ* mode). Anyone has this problem with the non-OEM valves?

This phenomenon is so common that I wonder whether the fault may
lie elsewhere than the heater control valve.  An alternate explanation
would be heat conduction through the sheet metal separating the engine
compartment from the blower intake area ahead of the windscreen. I
have yet to plug the heating hoses in order to test this theory.

>I installed it into the sys without taking into account the direction of
>flow. Does the flow direction *really* matter?

If there is a flow direction indication on the valve body, you should
assume that it does matter. Often, valve operation is assisted by
fluid flow.

DeWitt Harrison    de@aztek-eng.com
Boulder, CO
88 5kcstq