Heat comes out of center console when air conditioning isn't on on 1999 Saab 9-5

In summer, if I don't turn the air conditioning on, heat comes out of the center console. Also if the windows are open in summer this heat coming out of the center console happens also.

Asked by for the 1999 Saab 9-5
I have the same issue, and from what I heard from a dealer, it's just the car's normal venting system. Not a very good answer, I'm still trying to figure out how to fix it. In the winter, I solve the problem by putting the A/C on 70 degrees and directing it towards the defroster and that makes the hot air less noticeable. The summer is still an issue.
this is a blend door issue easy fix