[diesel1962]

Hello.Did you think to look at a vacume hose that goes to the fire wall? I accendently pulled mine out during a spark plug change,Then when I went to use the a/c the next day,No air thru dash vents! I thought that I had selector problems,Cause all I had was air blowing out defrost vents. Then I got looking under hood and found vacume hose disconnected. Look to the right of the brake booster and just below the maxi fuse center.You will find a couple of hoses that plug into fire wall.Check it out! My Olds is the same year as yours,And had simular problem! Did not cost a penny to fix! Let me know what you find.Diesel 1962