I’ve read similar posts but nothing with quite this problem. We’re only getting air out of the vents, no defrost or floor. Hot/cold mixture works fine. Blower speeds up to high when defrost is selected. I checked the damper control motor and it works - at least most of the time. I will change it if I can solve the other puzzle: With the motor out I can manually move the damper arm. It moves freely and I think I hear the door moving. But that doesn’t change the air flow direction either. Is there another damper somewhere or could something be broken “inside”? Can I get in there without dismantling the dash? Also, it’s an intermittent issue, which might be a motor problem but I’d think if I move the damper arm I’d see a change. Any advice is appreciated.