phil hans wrote:

> thanks for your help.  Actually, then, there is
> another problem in that I have only 3 heater controls.
>  I am missing one of the control at the bottom. So if
> I fix this, the problem will be fixed?

That is no problem, the 4th vent is for optional roof fresh air vents.
If you have four black air vents in the roof in the rear, you have a
problem. If you don't have the vents, you don't have a problem.

PerL
87 Syncro 112i