2020 Update

Although nearly two years old, all of the information in this article is still relevant. Learning how to reset an ADT system can be important; scroll down to find out how. 

An ADT home security system can help to keep your home safe and secure. However, after a power outage, after replacing the battery or for unknown reasons, you may need to reset your system. It is important to note that some ADT systems are different. As such, you should always consult your owner’s manual to learn how to reset your specific system if these steps do not work. Here are the steps involved in resetting an ADT home security system.

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    Resetting the System After Entering the Wrong Code

    If your home security alarm is going off, you may be flustered and may enter the wrong code. If you are unable to enter the right code, it may trigger the police to arrive at your home. After hitting the wrong code, take a deep breath and then hit the “#” signal. The “#” signal wipes out the old numbers that you have entered and allows you to input the correct numbers in.

    Resetting the System After an Outage

    If your alarm has been going off while you were at work, if the power went out, if the battery needed to be replaced or if the system just does not seem to be working correctly, you may need to reset the keypad completely. Resetting the keypad is similar to resetting your phone when it isn’t working right. It reboots the system and helps to ensure that it can function properly. Here are the steps you will want to follow when resetting your system.

    • Look at your owner’s manual. You will need to find the rest code for your specific system. The reset code varies based on the manufacturer and model of your keypad.
    • Enter in the reset code. In most cases, the reset code is either your security code followed by the off button or the “1” button. However, in some models, it may be different.
    • After the system resets, enter in your security code to arm the system. If you are going to be at home, immediately disarm it. This helps to ensure that the unit did indeed reset and is ready to go.
    • If resetting the system didn’t fix your problem, contact your alarm monitoring company.

    A young woman wearing a colorful plaid shirt is pressing buttons on the white alarm panel in her home.

    Resetting An Access Code

    If you have given someone access to your home alarm system and you want to change the user’s access code, you can reset the access codes. It is important to understand that this is just for user access codes, not for your master reset code.

    When you are looking to change a user access code, enter your master code, followed by the number 5. Next, enter the two digit number of the user whose code you want to change. This is generally a number anywhere from 01 to 30. After doing this, the system will prompt you to enter a new user code. This can be a number that is either four to six digits. After entering the code, press the “#” key. On some systems, you will have to reenter the code to verify it. After entering it, try the code out to ensure it works. If it does, you have successfully reset the access code.

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