Should I take it apart and see if I can find something loose or otherwise obviously not-right, or just punt and call a repairman?
Edit: It might not be fine after all. I just pulled something out of the freezer for dinner, and things weren't frozen although they appear to have been so fairly recently. I know the freezer was fine last night. I *think* I might have just not closed it all the way (it's a bottom freezer, drawer-style) and let all the cold fall out, but I'm not sure. It feels like it's producing cold, though. I took everything out and stuck an ice cube tray in to see if it freezes or not.