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How to Turn On Your ADT Alarm System

This article is a collaborative effort, crafted and edited by a team of dedicated professionals.

Contributors: Muhammad Baballe Ahmad, Mehmet Cavas, Sudhir Chitnis, and Zhen-ya Liu.

✓ Verified & Tested Information

How to turn on your ADT alarm system is a question we get a lot. Here’s a quick guide on how to do it.


ADT is one of the leading home security companies in the world, and their alarm systems provide excellent protection for your home and family. Learning how to use your ADT alarm system can be a daunting task, but with the right guidance and a bit of practice, you should have no trouble turning on and off your system. In this article, we’ll go over the basics of using your ADT alarm system, including how to turn it on and off.

Overview of ADT Alarm System

An ADT security system provides peace of mind for homeowners, by allowing them to monitor and protect their home from intruders. All ADT systems come with a range of features that can be tailored to satisfy individual needs. Features such as remote access, wireless sensors, and panic buttons are all included in the system. To use your alarm properly, it’s important to know how each feature works, as well as how to arm and disarm the system. This article will provide an overview of theADT alarm system and walk you through the steps on how to turn it on correctly.

ADT systems come in different models with various levels of security. The two main types are customer owned (COS) and rental (RAS). With a customer owned system, you purchase the entire security package up front and install it yourself. With a rental option, monthly fees are associated with installation costs, monitoring services are provided by ADT partners and repairs can be requested at any time.

Most ADT systems require entry codes for activating or deactivating them (although some have alternative solutions such as touch-pads or smart home applications). When entering an activation code: press 1-2-3-4 followed by # on your keypad — this is a universal way to activate/deactivate any alarm system parameterized with numeric codes

When arming your alarm from away from home (e.g., when leaving for work), always enter your code twice for added protection against unauthorized access – this will sound an alert if anyone attempts to gain entry without entering their authorization code first

To deactivate an ADT alarm: first type # followed by 1 then enter your code twice – if you have additional optional features such as motion detectors or panic buttons they will be disabled alongside the standard arming procedure

Setting up the System

Whether you are moving into a new home or just curious about the security system, understanding how to turn on your ADT alarm system can be a useful tool. Turning the system on is relatively straightforward and easy to do. This section will cover the steps necessary to set up and activate your ADT alarm system.

Prepare the system for activation

Before you can activate your ADT alarm system, you must properly prepare the system. This includes setting up the equipment, connecting all that is necessary, and programming the system.

Preparing the System:
1. Unpack and install all monitors and components that are provided with your new ADT Security System.
2. Connect the security system to the main power source using the appropriate adapters or batteries within each device. Ensure that all cables and cords are connected securely in their respective places to avoid any loose connections or power interruption during activation.
3. If applicable, link any existing doorbells or sensors with ADT Smart Home features to be able to have access control as part of your home security system setup.
4. Place motion detectors in strategic points around your home or office so they best detect movement within its range of coverage but not too close as motion sensors tend to trigger falsely in a very narrow area since it is sensitive enough to react from small movements from pets or ground vibrations from low noise environmental sounds like those coming from appliances such as air conditioners for instance.
5. Install door/window sensors at every openable entrance of your house/workplace area where external entries may occur such as doors, windows, pet doors and gates so that it will accurately activate when an unauthorized access attempt is sensed without unintentionally setting off an alarm if a family member simply walks through a doorway without first disabling their alarm code on their way out..

Connect the system to your home network

Once you have determined the location of your Wi-Fi router, connect the phone line to your home phone system or VoIP adapter. Then, you must plug your router into the internet modem. Lastly, plug an ethernet cable between the ADT security system and either an Ethernet connection on the modem or directly into an open port on the Wi-Fi router.

Once the connection is completed, power up the system by plugging in its transformer adapter and pressing ON/OFF on its keypad. When both lights turn green, your system is ready to be configured with cellular backup and operated from an app on your smartphone. Once everything is set up and connected, you will be able to receive safety alerts regarding security threats to your home.

Activate the system remotely

Activating your ADT alarm system remotely is an easy way to make sure that your alarm is set and ready to go. With the remote access feature, you’ll be able to control the system from anywhere with an internet connection.

To activate the system remotely, first you will need to press and hold the programmed arming button on your control panel for three seconds. The green LED light should illuminate to indicate that the system is ready to be armed. You then need to enter your four-digit code twice or press and hold a programmed keyfob button for three seconds. Once confirmed, the panel will be armed and ready for use!

If you have a wireless keyfob with remote ARM/DISARM capabilities, you can also activate your ADT alarm without having to physically enter a code or use your control panel. Simply press and hold any of the buttons for three seconds when you are away from home, and your security system will be activated without any manual interaction at all.

Activating the System

Activating your ADT alarm system is the first step to ensuring your home is secure. This process is straightforward and easy to do, but it is important to take the time to do it correctly. In this article, we will discuss the steps you will need to take to successfully activate your ADT alarm system.

Enter your code

Once all of the resulting system checks are completed, you will be prompted to enter a unique code of your choosing. This code must include four to 12 digits, with five digits being the most common for general households. Avoid using something too easy to guess, like your home address or a birthday, but make sure the number is memorable for you so that it is convenient when disabling or turning off your system. After entering the code correctly twice on your keypad, led lights will indicate that the system has been activated, meaning that any authorized personnel carrying an ADT passkey can now enter and exit without setting off an alarm. The main panel can be used to override other access codes which can be used to disable certain features and manage user access rights if needed.

Set up your user profile

Setting up your user profile is one of the most crucial steps in activating your ADT alarm system. User profiles are used to determine who is allowed to interact with the system and make changes to the settings. To set up your user profile, you will need to log in to the ADT mobile app or website and follow these steps:

1. Create a username and password. Make sure that these are unique from any other usernames or passwords you may have.
2. Enter your personal information such as address, contact details, and valid ID number as required by ADT.
3. Provide any additional details as needed (e.g., emergency contacts, access codes).
4. You can also set up biometric authentication using fingerprint recognition if desired (this requires an additional device).
5. Review all of the information provided for accuracy before submitting it for review and approval by an ADT representative.

Once approved, your user profile will be active and you can start further setting up your ADT alarm system! It’s important to ensure that all information provided is accurate so that you can maintain security at all times.

Set up your sensors and detectors

When you first receive the ADT system, it will be necessary to set up sensors and detectors around your house. Depending on the system you purchased different components may be included in the setup. Common pieces of equipment include motion detectors, door/window contact sensors, and fire/smoke alarms. These components can be secured or wired depending on your needs. Before connecting any components of the security system to your home wiring, make sure it is powered off and that all other electronic devices are turned off as well.

Motion detectors should be mounted in a place where movement is likely to take place, such as an entry hall or living room space. Additionally, they should be pointed at a doorway or window so that any activity taking place there will trigger an alarm alert. Door/window contact sensors need to be placed on any doors and windows that could potentially be used as an entry point – such as outside access doors or second floor windows – have them installed near the opening so that the sensor detects movement when the door or window opens. Smoke alarms are typically placed in main living areas such as bedrooms or living rooms for maximum protection for occupants in case of a fire emergency. Once all components have been installed in their respective places then it is time to connect them to your main control panel for activation and operation instructions.

Testing the System

Testing the ADT alarm system is essential to ensuring it is working properly and that your home is secure. This testing should be done on a regular basis and can be done by following a few simple steps. Testing your system will enable you to make sure all components are functioning properly and that you are properly covered in the event of an alarm. Let’s take a closer look at how to test your ADT alarm system.

Test the system with the ADT app

Testing your ADT alarm system is easy and can be done with the ADT app. To start:

1. Open the app and select the “Alarm” icon.
2. At the bottom of the screen, you will see two buttons, “Test Alarm” and “Test Phone Line”.
3. Press “Test Alarm” to test connected components, such as door/window sensors, motion detectors, and smoke/carbon monoxide detectors.
4. An audible chime will play from each component when it is successfully tested or an alert will appear displaying some important information about that component if it fails a test or is offline for some reason..
5. After all components have successfully been tested you will receive a notification saying “Alarm Test Successful” indicating that your system is functioning properly..
6. Press “Test Phone Line” to make sure your system has a reliable connection with ADT monitoring services via phone line. This test should take no more than 5 minutes to complete and should result in either “Phone Line Test Successful” or “Phone Line Test Failed” notifications being sent to your device..
7. If you receive notification of an unsuccessful Phone Line Test attempt please ensure your phone line is still properly connected with the alarm panel then retest using your ADT app before calling technical support for help troubleshooting any questions or concerns you might have..

Test the system with a keyfob

Testing the system with a keyfob is the easiest way to confirm system operation and correct signal transmission. Before testing, make sure all motion, window and door sensors are properly placed and clear of obstructions.

If your system comes with an ADT Pulse interactive mobile phone app, you can also use it to test the system from any location. To check each individual device, press and hold the reset switch (normally marked by a red triangle) located on the outside of the alarm control panel for two seconds. A voice prompt will guide you through device checking step-by-step.

To test using a keyfob, press and hold down either top button for three seconds until both buttons start to rapidly flash red light and beep continuously. When this occurs move within 10 feet of your control panel until it stops beeping or flashes green light – confirming that signal has been transmitted successfully. You will hear voice prompts guiding your testing steps one by one as they are logged in memory on the control panel’s log history list which can be accessed through your phone app or computer access point if you have added into your security package.

Test the system with a keypad

Before you can begin to use your ADT Alarm System, it is important to make sure the system is working properly. Testing the system with a keypad is the simplest way to do this. Follow these steps to safely test your alarm system:

1. First make sure that all windows and doors leading into your home are securely locked so that the system can be properly tested.
2. Next, press and hold down the “Mute” button on your keypad for 3 seconds. An audible tone should sound if this was done correctly.
3. Now enter your security code, then press “#” to arm your system and wait for a second, confirming audible tone that indicates it has been enabled
4. To confirm that the exterior sensors are functioning properly, open any one door or window while you’re still entering code.
5. You should hear another alert sound indicating that it was detected by sensors and thus rendering the alarm ineffective
6. Close all of the doors and windows in order to disarm the system by pressing “*” followed by entering your unique numerical passcode again
7. If successful, a loud beep will sound 2 times which means that the alarm has been successfully deactivated
8. Now test each zone in order to verify functionality (eg: kitchen window or basement door) before setting up alerts or arming/disarming via supported mobile apps/devices


If you’re having trouble turning on your ADT alarm system, there are a few troubleshooting steps you can take. These steps will help you identify the cause of the issue and fix the problem. From verifying power connections to resetting the system, this article will walk you through the troubleshooting process for your ADT alarm system.

Reset the system

If your ADT alarm system is not responding, you can reset the system to bring it back online. To do this, turn off the power to the system completely and disconnect the backup battery until all components are completely powered down. Then wait approximately 10 seconds before connecting the battery back up and restoring power to the system.

Once power is restored, your alarm’s LED should be steady green. If it is not, try holding down the reset button for 3-5 seconds until LED blinks several times and then turns off again. This should reset the system and restore full functionality.
If you have an internet connected model of ADT alarm, you may need to manually re-pair with your internet router after completing this procedure. Refer to your owner’s manual for exact instructions on how to pair with your particular router model.

Check the batteries

Before attempting any other troubleshooting steps, it is important to ensure the system is properly powered. ADT alarm systems are powered by a battery backup, which may need to be replaced if your system fails to turn on.

First, open the main control panel and locate the battery compartment. The batteries can be found inside this compartment and should be checked for any signs of corrosion or damage. Be sure that the connections are secure and that the batteries are still charged and can be used as normal. If necessary, replace the batteries with fresh ones of the same type (generally lithium).

Once you have changed or verified that your batteries are fully charged, close the battery compartment and reinstall your system’s keypad cover. Hold down one of the test buttons for around five seconds in order to initialize the unit. If your ADT alarm system turns on at this point, your problem should be resolved; however if it does not turn on then further troubleshooting steps may need to be taken.

Contact ADT customer service

If you’re still unable to turn your ADT alarm system on, you may need to contact ADT customer service for assistance. It’s important to keep in mind that different systems require different settings and guidelines, so you’ll need to contact the security company in order to determine what type of system you have and how it needs to be set up.

When contacting ADT customer service, they will walk you through the steps necessary for adhering to your particular home security setup and activating the alarm system. Be sure to note any error messages appearing on the screen, any lights that appear lit or flashing, and any other information which could assist Customer Service in helping with your specific needs. Additionally, be sure to have all relevant documentation supplied when contacting customer service. At this point, a representative may troubleshoot with you over the phone; however if more assistance is needed then an in-home appointment may be scheduled with a professional installer or technician.

How to Turn On Your ADT Alarm SystemCheckout this video:

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