Door locks have a lot of moving parts so it goes without saying that.
Front door lock not working.
Next the lock needs to be lubricated.
5 door lock problems that should not be ignored 1.
If you can put the key in the lock but cannot to turn it the lock may have seized because dirt or grime has gotten caught in the mechanism.
If your doorknob mechanism fails internally you can t repair it.
Loose door locks door knobs and door handles.
1 loosen the setscrew on the knob s shank.
To clean the lock mechanism insert a damp cotton swab into the keyhole and jiggle it around to attract the dirt.
If it is hold the key with a heavy glove and heat it with a match or lighter and then work it gradually into the keyway.
Never use oil for this task.
The complete lockset including the doorknob.
How to fix a door that will not lock things you will need.
Check the draft.
You can tighten a simple interior mortise lockset like the one shown at left as follows.
Misaligned locks are often used interchangeably with misaligned strike plates.
2 hold the knob on the other side of the door and turn the loose knob clockwise until it fits snugly.
If the key won t go into the lock ask yourself if the weather is cold enough for the lock to be frozen.
Repeat heating and inserting the key until the ice has melted.
Watch as a professional home repairman shows how to fix door.
3 if this does not help remove the knob.