If the malfunctioning lock is in the door handle there will be at least two screws securing the door handle to the door.
Home front door lock wont unlock at all.
Flip the key and open the door.
Remove these screws unscrew one side of the door knob and pull the door handle and lock assembly out of the door.
The door could be misaligned so that although the door can be unlocked while the door is ajar when closed the door cannot unlock.
Outdoor locks can collect a lot of dirt and dust inside the lock cylinder.
Misaligned deadbolts and latches are common door lock problems.
Lubricate the moving components with graphite then replace any broken parts and reassemble the lock.
The lock cylinder may be broken so that you cannot use your key or anything else to move your door lock into the unlocked position.
Spray the door key with a graphite based lubricant.
This video shows how to disassemble and lubricate a basic cylindrical doorknob.
That can cause the pins to get stuck in a partially raised position and prevent the plug from turning.
Don t use a wet.
In most cases it means that the latch or locking bolt are not lining up with the door locks strike plate.
Slide the key in the lock and tap lightly on the key to lubricate the inside of the lock.
A strike plate is usually affixed to the door jamb and facilitates the extension of the bolt or latch.
The same solutions apply to when you are solving the issue with most broken locks.
Remove the old lock.
Locate the screws holding the lock in place on the inside of the door.