So I did some experimenting with this. I'm not sure exactly where to start troubleshooting for a fix. If I lift up on the door lock plunger, I can open the door from the outside, but not from the inside. It sounds to me like there is a combo problem with the action on the actuator arm at the latch assembly combined with a problem with the child safety switch. I don't know - I feel like I just made all that up. Should I just plan on replacing the latch assembly to fix? What could cause this kind of behavior that is actually fixable without replacing the latch assembly?