Unlocking the entrance door and cylinder replacement due to latch bolt malfunction

"I tried to repair the front door lock myself, but I couldn't open it."

The client himself removed the front plate.For this reason, it seems that the door did not open when the door was closed.

The reason is that the latch bolt got stuck and the door couldn't open. I entered from the kitchen door and managed to unlock it by operating the latch bolt from the inside.The front was installed and the work was completed, but as a security measure, I replaced the disk tabler cylinder with a KABA dimple key.

There was also a latch operation defect due to aging dirt, so it was improved by disassembling and cleaning after confirming that there was no damage.