Another added point on my center vent issue... Of course any help here is very welcome...!!

What I have found is that the a/c center vent seems to work fine if the outside temp is say 65 degrees F. I know your saying why run it at that temp. However, I was wondering if there could be some sort of "controller" or "sensor" malfunctions... Or what about the controls what happens when the climate controller fails? Any ideas on controller symptoms?

Thanks again!!!

Hal