Great picture of the VacPod internals.

My 126 didn't blow center vents, but a few hours with a Mit-y-Vac and I determined I could hear each and every pod work and hold air.

I pulled the electric vacuum switchover valve assembly and 2 of the vacuum switches were bad. Changed that for $20 ebay part and now ALL the vents work correctly.

BUT... I also found my "Feet" flaps and rear vents still didn't work.
Turns out whoever was in the dash last managed to disconnect the pod from the actuator arm for the Legroom vents. And the rear vents are push-pull cable control which was just sitting there disconnected! Laziness.

Print out the diagrams and do some solid detective work before a big tear-down. It paid off for me.

Tj