NAGASAWA Kodai Asuka thumb-latch lock malfunction repair

"Neither from the thumbturn side nor from the outside"

It was said that it would not turn from the cylinder side either.This is a detached house for rent.

It was a new lock.The product was an KODAI Asuka thumb-latch tablet, but the problem was its main lock. It seems that the latch does not work even if you operate the thumb-latch.Moreover, it does not return even if the latch is retracted.

Once I loosened the screws and started disassembling, the latching action returned.Moreover, it is processed quite badly by some trader.As a colleague, I was in a state of surprise.

The screw was tightened too much due to the thinness of the aluminum sash door, and the door was distorted.By tightening with moderate torque, the operation was restored and improved.I found out that there are also unique stepped metal fittings, and I was able to obtain a lot of information.