Remove the old lock.
Top lock on door won t lock.
If the door lock is damaged replace it.
Tap the end of a chisel under the door stop on the striker side of the jamb.
If the malfunctioning lock is in the door handle there will be at least two screws securing the door handle to the door.
Instead car door locks usually employ wafer locks and sliders.
If it won t lock open the door.
It should be noted that the locking mechanism on car doors is not the traditional pin tumbler lock.
Pry up on it until it comes loose and remove it.
Key will not work if you ve had a new spare key cut recently it could be a poorly cut key causing the problem.
Cold and freezing weather will cause a upvc door to not lock or close properly this is due to contraction of the upvc the shrinking can only be 1mm o r 2mm but is enough to stop your door from locking.
Watch as a professional home repairman shows how to fix door.
Inspect the door lock for damage.
Fixing or repairing a door lock may seem like a daunting task but it can be very simple to fix.
Warping if the door cannot physically lock due to the frame or door being warped an adjustment of the strike plate could rectify the problem without the need of a new lock.
Locate the screws holding the lock in place on the inside of the door.
The door lock assembly might be defective.