How to change the bolt of the anti theft door

This lower latch is falling off, probably because its quality is not very good.

I don't know if the maintenance period of the anti-theft door Ling has passed, if it has not passed, you can arrange someone to repair, and then you can't go online to find some door-to-door service repair stations, but you must be careful to ensure its true reliability. >>>More

Find his after-sales service, and he will fix it for you.

The landlord's question is not detailed enough, according to what you said, it is estimated that the switch of the walkie-talkie in your room is broken, take it apart and see if it is broken, or loose. If it is for other reasons, it is recommended that you call the unit intercom door manufacturer through the property management company to come and repair it. That's for the best.

Generally, it can't be replaced, and it is embedded in the wall when it is installed.