T
The Daily Insight

How do I change the code on my ADT lock?

Author

Samuel Coleman

Published Feb 21, 2026

How do I change the code on my ADT lock?

To change the user codes in the ADT system with keypad controls, press the star key and then the number 5 to indicate you want to reprogram a number. Enter your four- or six-digit master code number. Select the user access code you want to change, identified by entering 01 through 32.

How do I change the code on my alarm system?

Only the main user of the alarm system can change the master code. Here are the steps to do it if you know the default or existing code: Enter your current master code. On Vista systems, the default code is 1234. Press 8 (the CODE key).

How to change the master code on a Honeywell alarm?

How to change the master code of a Honeywell Alarm system 1 Press 8 (the CODE key). 2 Press 02. 3 Enter a new four-digit master code. 4 Re-enter the new code. The keypad will beep once to let you know that the code has been changed.

How do I change the security code on my computer?

On Vista systems, the default code is 1234. Press 8 (the CODE key). Press 02. Enter a new four-digit master code. Re-enter the new code. The keypad will beep once to let you know that the code has been changed. If you don’t know the installer security code, you can still change it.

How do I Change my ADT access code?

Select the user access code you want to change, identified by entering 01 through 32. Enter the new four- or six-digit code. Press the # key to indicate you have finished programming. Test the new user code to see if it arms or disarms the system properly.

Only the main user of the alarm system can change the master code. Here are the steps to do it if you know the default or existing code: Enter your current master code. On Vista systems, the default code is 1234. Press 8 (the CODE key).

How do I change the user code on my computer?

Enter your master code. Press 8 (the CODE key). Enter a two-digit user number (from 03 to 33) for which a user code is to be assigned, changed or deleted. If you’re assigning or changing a user code, enter a four-digit code that will be used by the person you assigned that code to. The keypad will then beep once.

How to change the master code of a Honeywell Alarm system 1 Press 8 (the CODE key). 2 Press 02. 3 Enter a new four-digit master code. 4 Re-enter the new code. The keypad will beep once to let you know that the code has been changed.

Select the user access code you want to change, identified by entering 01 through 32. Enter the new four- or six-digit code. Press the # key to indicate you have finished programming. Test the new user code to see if it arms or disarms the system properly.