Driver door lock problems

[Derptastic]

Lately I've been systematically working out the bugs in my car. I have a problem with my driver door lock where I cannot lock it while the door is open (the plunger becomes stalled)...also I am unable to lock it using the key-but unlocking works and feels normal. The key/cylinder turns freely with slight resistance when turned clockwise to lock. The lock actuator works fine.

Any ideas what might be causing this to happen?

[jeffnhiscars]

It won't lock with the door open by design...discourages you from locking yourself out.

I'm thinking you should get a lock rebuild kit