I have a yale lock on my door from the previous tennants and the block with the handle (internal side of the door) has slipped down, and the mechanism no longer lines up with the space on the door frame.
Can I fix this myself or should I call a lock smith? The lock itself work perfectly, it is more that the housing has dropped a half an inch downwards.

Kit, September 2017

Do it yourself,remove the three screws holding the back of the lock and you will see a plate with two screws in it,just tighten the screws after you have aligned the plate.It will all be obvious when you take the back of the lock off,it is a very simple mechanism.

rich, September 2017