Could it be the linkage between the lever on the dash and the valve? Perhaps it has become disconnected at one end. Or do you feel some resistance when you move the lever like it's opening/closing the valve?

> On May 23, 2024, at 7:03 PM, ron johnson <rcj.yes@ICLOUD.COM> wrote:
> 
> My 91 is so uncomfortable in the summer. 
> Heat pours out of the dash with the heat control fully off. 
> Recommendations mostly point to replacing the control valve which is a difficult process. Howes sells a deluxe unit for $90….. 
> Can a shut-off valve be installed in an easier to access location. 
> 
> Many Thanks, 
> Ron J 
> Portland, OR 
> 91 Weekender, ‘Betsy’