The closer has been acting erratically, It swings the door to close but stops a short way from closed. It then slams the door shut quite quickly over the short distance to 'closed'
The lock is then jammed shut and very difficult to open. The lock is not closed but is still open.
I have tried to dismantle the lock after undoing various screws I can take off the handles but I cannot take out the lock mechanism. Also I do not know what to do with the closer to stop it closing so fiercly