In our previous blog post How to Change Code on Keypad Door LockⅠ and How to Change Code on Keypad Door LockⅡ, SIGNSTEK detailed how to change the code for four types of keypad door locks: the ST-668 plus touchscreen door handle, the PT-R0S00 electronic door handle, the PLU331 keypad deadbolt and the YL-99 digital door knob.

Just in time for the release of SIGNSTEK's new ST-668D touchscreen keypad deadbolt lock, this blog will give you the details of how to unlock it and how to change the code of it.

If you have any questions about ST-668D keypad door lock, you can leave them in the comments below.

How to unlock the keypad door lock

Before you unlock the keypad door lock, here are some things you need to know first.

PC: Programming Code. Default Programming Code: 000000 (PC must be 6 digits in length). As you can change any other code via PC, please change the PC as soon as possible when you buy a new SIGNSTEK keypad door lock

UC: User Code. Default User Code: 1234 (UC must be 4 digits in length). After setting the new UC, the default code will be invalid automatically. If you delete all UC, the default code will be active.

Note: Before programming, please activate the keypad by touching any key. Only when the keypad light is on, are the operations valid. If the keypad light is off, you need to re-operation.

1. Change the PC:

Enter default PC → Press # (wait for a green light and long beep) → Press ③→Press # (wait for a green light and beep) → Enter new PC → Press # (wait for a green light and beep) → Enter same new PC → Press # (wait for a green light and long beep).

2.Add new UC:

The 4 digits of UC must be different from the 4 numbers of the PC. Our ST-668D touchscreen keypad deadbolt allows for at most 9 sets of code.

Enter PC → Press # (wait for a green light and long beep) → Press ① → Press # (wait for a green light and beep) → Enter new UC → Press # (wait for a green light and beep) → Enter same new UC → Press # (wait for a green light and long beep).

3.Delete unwanted UC:

Enter PC → Press # (wait for a green light and long beep) → Press ② → Press # (wait for a green light and beep) → Enter unwanted UC → Press # (wait for a green light and beep) → Enter same unwanted UC → Press # (wait for a green light and long beep).

4.Toggle mute on/off

Enter PC → Press # (wait for a green light and long beep) → Press ④ → Press # (wait for a green light).

Repeat same steps if you want to turn beeper on.

5.Delete all UC:

Enter PC → Press # (wait for a green light and long beep) → Press ⑤ → Press # (wait for a green light and beep) → Enter PC → Press # (wait for a green light and beep) → Enter same PC → Press # (wait for a green light and long beep).

6.One- touch locking function:

If you enable the one-touch locking function, you can press the # key to lock the door and do not need to enter the code to lock the door.

Enter PC → Press # (wait for a green light and long beep) → Press ⑥ → Press # (wait for a green light and beep).

7.Code privacy:

To protect the code privacy when entering it, the ST-668D keypad deadbolt allows you to add any digits around the code. The digits length can up to 40 including correct codes.

As long as the correct code is surrounded around the 40 digits, you can unlock the door.

For example: Your UC is "1234", and you can enter "45671234789" to unlock the door.