Warping, getting the key stuck in the lock, a faulty lock and the deadlatch not working are some common door lock problems. Door warping occurs due to poor weather conditions. It prevents locking points from engaging the keeps that prevent the door from locking.
The deadlatch that prevents the opening of the door via credit card, knife or other similar tool must be depressed when the door is closed. If not, it usually fails. Often, the key gets stuck or becomes hard to turn. When too much force is used, the key may break inside the lock cylinder. Lubrication of the lock is always a preferred solution, states home improvement company Dyno.