RepairPal Certified shops can diagnose and repair your 1995 Oldsmobile Cutlass Ciera. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
It sounds like the defroster door is not working, most likely it is a defective defroster door actuator.
here are some shops:
https://repairpal.com/oldsmobile-repair-in-omaha-nebraska
Is this repair something that can be done at home? Or is it possible to get the defroster open and just keep it open?