x-post to rec.autos.tech,alt.trucks.ford
4.0/ AT, 85K, CC recall performedSymptom: Diverter valve remains open and does not respond to heat control potentiometer.
It closes as it should when the HVAC is set to "Max AC" or "Off" per the vacuum map I got from the Advance site.
I'm out of ideas. -----
- gpsman