Inspect the door lock for damage.
Top lock on door won t lock.
Tap the end of a chisel under the door stop on the striker side of the jamb.
There are more efficient ways to bypass a car door lock so you won t find most people picking these locks.
Remove the old lock.
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.
If the door lock is damaged replace it.
Instead car door locks usually employ wafer locks and sliders.
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.
The door lock assembly might be defective.
If the malfunctioning lock is in the door handle there will be at least two screws securing the door handle to the door.
Fixing or repairing a door lock may seem like a daunting task but it can be very simple to fix.
Key will not work if you ve had a new spare key cut recently it could be a poorly cut key causing the problem.
Watch as a professional home repairman shows how to fix door.
Pry up on it until it comes loose and remove it.
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.