I have tested the vacuum system for the vent system. Everything worked properly. I have reason to believe that it has something to do with the wiring to the heater electrical switches. The system was not working properly. I replaced the factory stereo from an auto wrecker and the ventilation started working properly. Then I had issues with the stereo, tugged somewhat on the wiring, which I think has the heater wiring in the harness, the ventilation system acted up again. A few weeks later I was preparing to replace the ventilation controls, I road tested the system to check if it was working. To my surprise, the ventilation system was working. I am at a loss. I guess I should be glad it works. Thanks for your input.