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1. The lock cylinder is faulty.
2. Failure of the lock body.
It is recommended to find a professional lock repairer to check.
Why can't it be opened, it may be that the lock bolt is crowded, you can pull the door rotary key, push the door rotary key, carry the door rotary key, you may open it with various actions to rotate the key, it really can't be opened, just call the lock company or remove the panel inside.
1.Disassemble the door lock, because the door lock fastening screws are in the door, unscrew the screws, then remove the shell, and use the change cone lock spring to open the door. >>>More
See if it's locked.
Underneath it's like a screw, it's a switch that reverses the lock. >>>More
Hello, if you want to change the door, the best lock to make is the Wang Li anti-theft door, which is convenient and easy to use.
Grade lock cylinder, with technical opening time within 1 minute. >>>More