Does the key turn in the lock but not unlock the door? Locks, latches, doorknobs, and hinges--door hardware--can make it difficult to get into or out of a door. But you can make it better by fixing that sticky lock or loose hinge.

How Does It Work?

A lock is a door fastener that is operated by a key or knob. A latch is a device that holds the door closed. A door knob releases a door latch. A hinge allows an attached door to swing. Together these devices open, close, and secure doors.

Exterior doors often have both a key-in-knob lock and a deadbolt or rim lock. Interior doors usually require only a door knob and latch. Both slide the latch into a strike plate mounted on the door jamb.

What Can Go Wrong?

Door accessories are relatively trouble free, but are used frequently, so problems can occur. Locks stick and work slowly. The key may break or may not open the door. The cylinder may move when the key turns. The key may turn but the bolt doesn't move. The bolt may not extend. Hinges may squeak, become loose or damaged. Keeping the door hardware clean and lubricated solves many potential problems.

Fix-It Tip

Want to save some money? If the door's lockset requires the service of a locksmith, remove it and take it in for service rather than pay for the locksmith to visit your home.