I just swapped in a blower motor and new blower relay to fix my problem of no air circulation. Now the air just blows out of all the vents at all times, no matter what button I press on the climate control. I'm guessing the ventalation system is vacuum controlled. Can anyone explain what I should be looking for to fix this problem? This is on a 92 Prelude Si w/ 4WS.

 

Have you seen the post about resoldering some relay points on the back of the climate control? That might be your problem. It's supposed to fix the vent switching problem i think. You should try looking for that write up.