I know my car has HVAC vacuum issues. No matter what button is pressed I get air flow from all the dash vents and defrost vents only. I have not checked the entire system. I have it disconnected from the vacuum supply under the hood, because when it's plugged in, anything needing vacuum, does not recieve it.

I'll begin chasing it in the spring. So in the mean time it's cold feet and warm hands.

I know what you mean!
 

I had an enormously warm face and hands, but my feet were begging for mercy. I don't get anything out of my center vents either. I have read some about that pod on here...sounds like a bear. I might terminate the vac. line on that one too, and just use the dampers on the dashboard to control it. But it's really nice having a little warm air on your feet when its in the 20's.