1992 Ford Tempo door locks

This has been this way for years but i'm curious to see if it's a simple problem or not. Auto door locks use to lock all 4 doors. Then a few years ago the drivers door stopped unlo9cking. I have to do this with a key. Then the back passanger door, kitty cornor to the drivers stopped unlocking. Not sure but does a fuse 23a ring a bell to anyone. I read somewhere this or maybe it was a 30a is the fuse I need for the problem. In where the fuses go, it's big and silver. Does this sound like a fuse problem or something bigger?