When you first enter your ADT security-enabled and armed home, the control panel on your alarm system sounds or makes a beep to alert you the alarm has engaged. If you fail to reset the alarm within the required time limit -- programmed during installation -- the system sends a message to the home security giant, based in Boca Raton, Florida, to alert the local law enforcement about a potential break-in at your home.

Disarming the System

After entering your home with its ADT system armed, the keypad on the control console beeps. You must enter your private access code within the allotted time -- which varies based on how it was programmed during installation -- to avoid a false alarm. If you enter an incorrect access code, the system does not disarm and it emits a two-second error tone. Press the pound key -- # -- and enter your access code again.

Remote Disarming

Some ADT systems have a remote that you can use to disarm the system, which works best for homes where the control console is located many rooms away from the home's entrance. Simply press the Disarm button on the remote. If you were successful, you should hear two sounds from the bell on the exterior of the home.

Reset User Access Codes

To reset the access code, you must know the master code for the system. You can change a user's access code as follows:

Step 1

Press the star key on the keypad in the control console, followed by the number 5. Enter the master code number.

Step 2

Enter the two-digit number assigned to the user whose code you want to change, generally a number from 01 to 32.

Step 3

Select and enter a new four- or six-digit user code, based on the system you have, and press the pound key to finish. Enter the new user access code to see if it operates the system correctly.