After the renovation of my house, the key of the anti theft door A was changed to B, but the insuran

Generally, most of the current security doors are A, B, and C methods.

A key decoration is generally equipped with 2 pieces.

B key owner official key is generally equipped with a handle.

C password key is generally one.

After the renovation is completed, after the conversion of the C password key, A and C are useless, and there is still a problem at this time.

You can find the property company and contact the manufacturer to see if there is a problem with the lock, or the property company to see.

Generally, experienced property company personnel will do it themselves, and it is not very difficult.

If it is a quality problem of the lock itself, you can ask the other party to replace the lock cylinder (along with all the keys).

In addition, you can try to open the door and then use the key switch to see if it works.

Most of them are due to the slight deformation of the door leaf caused by poor installation.

Cause problems with the expansion and contraction of the deadbolt and stem Try a little engine oil or cooking oil (not dripping oil in the keyhole, remember!). ）

A very simple question. You leave the door open and try the insurance. If the fuse can be opened, then it turns out that the bumper and fuse are not suitable. Apply white toothpaste to the bumper and twist the key twice when it is off. Look at where the white mark is, and then grind it.

It may be that the insurance is blocked, if it is a new house, it is recommended to find a developer, and if you buy it yourself, you can find the one that sells it to you, or it may be a lock cylinder problem.