I can't go out because the key won't stick. ALPHA 33KN-TRW-32D type knob lock

"Malfunction check and repair"

The client tried to go out, but the key doesn't stick.Recently, it seems that the key has gradually stopped sticking.

Is it malfunctioning due to aging?The scene was an apartment on the second floor of a pork cutlet restaurant along the main road.Because there is no signboard of the apartment name, it seems that I passed by once and got lost.

I finally found a property that looked like it and headed to the second floor.The stairs were narrow, and it was a little difficult to secure the work space, but it was improved with normal spray cleaning.

The operation of the main body case also felt strange, so I proposed to the landlord to replace it as soon as possible.