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How to Uninstall 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.

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If you’re moving out of a home with an ADT security system installed, you’ll need to know how to uninstall it. Here’s a step-by-step guide.


If you’re looking to uninstall your ADT alarm system, you will need to do some preparation beforehand. This includes gathering the appropriate equipment, ensuring that your power and phone lines are disconnected, and properly labeling each wire or sensor that needs to be removed. Once the preparation is done, you will be ready to begin the uninstallation process.

Make sure you have the correct tools

It is important to have the right tools on hand before you begin to uninstall your ADT alarm system. Depending on the layout of your home, the type of panels and sensors that make up your system, and even the tools provided by your local ADT technician, you may need different sets of tools.

For general assistance in this process, bring equipment such as a ladder, screwdrivers, a drill bit set including both Phillips and flathead bits, as well as pliers or wire strippers for electrical work. You may also need additional materials such as silicone caulk to reseal wires or mounts for outdoor cameras and other equipment. After you have gathered all appropriate tools, be sure to disconnect all power sources to prevent any potential electricity discharges during the uninstallation process.

Gather all the necessary materials

To begin the process of uninstalling your ADT alarm system, you will need to gather all the necessary materials to make the job easier. These may include a screwdriver, drill, wire cutters and/or battery replacements. It is important to read your user manual for directions on how to uninstall and dispose of your system correctly, as this will vary depending on your model.

You should also inform ADT of your intention to disconnect service ahead of time so that they are not alerted when you disable the communicator in the dashboard. By informing them ahead of time, it will prevent any false alarms being raised that could put you at unnecessary risk or incur additional fees or charges.

Disconnect the Power

To begin the process of uninstalling your ADT alarm system, the first step is to properly disconnect the power to the system. This involves switching off the main power switch located near the control panel, as well as disconnecting the backup power supply if you have one. This is a crucial step, as it ensures the system will not be active when you start uninstalling the components.

Locate the Control Panel

The next step to uninstall your ADT alarm system is to locate the control panel. This will typically be a box mounted on the wall near where you enter the home, and you may need to open it up with a screwdriver in order to disconnect the power. The control panel itself may contain a backup battery, so it’s important to remove this as well before shutting down your alarm. Be sure to unplug any cables attached to the panel, turn off any circuit breakers that power it, and also disconnect any hardwired door/window sensors before moving on.

Turn off the power to the Control Panel

Once you’ve disconnected the backup battery and disconnected your Control Panel from the mounting bracket, it’s time to cut power to it. This is an incredibly important step; without cutting the power, uninstalling your ADT Alarm System would be slightly dangerous. To do so, locate the main circuit breaker or fuse in your breaker box and switch it off. You may need to consult your owner’s manual to locate the correct main one.

If your ADT system is connected directly to a wall socket or outlet, unplug the power adapter from it. Be sure that all other sources of energy (i.e., batteries) have been disconnected prior to unplugging any power outlets or sockets. Once you have turned off all energy sources, unscrew and remove any wires that are attached to or running through the wall above/around/behind your Control Panel before carefully removing it (keeping in mind that wiring can still be live).

Remove the Control Panel

Before you uninstall your ADT alarm system, it’s important to start by removing the control panel. Doing this will ensure that the system will no longer function as it should, and you won’t be alerted if someone attempts to enter your home with the wrong code. Fortunately, it’s a relatively easy task, so let’s get started by walking through the steps of how to remove the control panel.

Remove the screws that secure the Control Panel

Before you can remove the Control Panel, it’s important to make sure that all wires connecting it to other components of your ADT alarm system are disconnected. This will insure that any accidental damage is avoided while removing the Control Panel. Once you have verified that all wires are disconnected and taped off, you can begin disassembling the Control Panel.

Using a Phillips-head screwdriver or drill, remove the screws that secure the Control Panel to the wall. Place these screws in a safe place for future reinstallation, if necessary. Pull down on the left-right connector at an angle until it separates from both sides of the wall panel. Discard your old Control Panel by either recycling it through your local municipality’s waste management program or sending back to ADT for proper disposal.

Lift the Control Panel out of the wall

When uninstalling your ADT alarm system, it is important to start by removing the control panel from the wall. To do this, you must first locate the control panel of your alarm system. This should be located near or on a wall near an entrance so that it can detect when someone enters or leaves the premises. Once you have located it, use a screwdriver to remove any screws that may be securing it in place and then lift it away from the wall to reveal any wiring behind connected to the back of the control panel. Disconnect each wire carefully and pay close attention to colour coding as some wires may not be able fit back into their original positions. After all wires are disconnected, carefully place your control panel aside and continue with remainder of your installation instructions.

Disconnect the Wiring

To uninstall your ADT alarm system, the first step is to disconnect the wires from the control box. Ensure that you have the owner’s manual and any additional product information to reference. It is also important to remember that you should turn off the circuit breaker to the control box before you begin. With the power off, it’s time to get started on disconnecting the wiring.

Disconnect all the wires from the Control Panel

It is important to begin uninstalling your ADT Alarm System with the Control Panel. First, ensure that the power is turned off to the control panel. Next, find which wires run into and out of the control panel. The color coding of these wires typically corresponds to how they are connected in the control panel and will tell you how to disconnect them correctly. Some control panels have multiple cords running into them, so it may take some time to identify which wire should be disconnected for a specific zone or part of your house. It is important to make sure all wires are disconnected from the control panel in order for a successful uninstallation process. Once all wires have been disconnected from the Control Panel, you can move on to uninstalling any other parts of your system that might remain in the home such as keypads or sensors.

Label each wire before disconnecting

As part of the process to uninstall your ADT alarm system, it is essential to correctly label each wire before disconnection. This should be done in an organized manner so that you will be able to quickly and easily reconnect them should you wish to reinstall the system in the future. Label each wire with a numbering system, coding colour or name (as appropriate) before unplugging it from the various components. This prevents any confusion when attempting to reconnect the wiring and makes for an easier installation process if you decide to reinstall your ADT alarm system in future.

Remove the Sensors

Uninstalling an ADT alarm system yourself is a relatively simple task. The most important step is to first remove all the sensors attached to your alarm system. This includes any sensors on doors and windows, as well as any other sensors that may be in place. Once these have been removed, you can then proceed to the next step of uninstalling the system.

Unscrew the sensors from the wall

Before uninstalling your ADT alarm system, you must first disconnect and remove all the sensors from the wall. This process is relatively simple – all you have to do is unscrew each sensor from the wall using a Phillips-head screwdriver. Once unscrewed, simply pull each sensor off the wall and set aside for disposal. If you are uncertain of which sensors are connected to your alarm system, consult your owner’s manual or contact ADT customer support to identify them. Be sure to mark each sensor with a pen or marker before uninstalling so that you can easily identify it later and ensure that it’s discarded in its proper location.

Disconnect the wires from the sensors

Now that you’ve removed the sensors, you will need to disconnect them from the system. You will most likely start with the sensors that were on doors and windows. Begin by locating where the wires attach to each sensor. Usually, the wires attach at the four corners of each door and window contact. Carefully remove each wire from each corner of the sensor while being mindful not to damage or lose any of them or their connectors. Once all wires are disconnected, your sensors are ready for removal.

Remove the sensors from the wall

Removing your sensors from the wall is one of the most important steps you need to take when uninstalling your ADT alarm system. Depending on which type of sensors you had installed, this process may vary slightly.

In most cases, the sensors are connected to the wall with a double-sided adhesive. To remove them, start by using a flathead screwdriver or a similar tool to slowly break through the bonding between the adhesive and the wall or doorframe. Carefully place the tool on its side and use gentle pressure to pry away from each corner of your sensor. Continue until you are able to pull away all four corners of each sensor. Do not use excessive force when doing this as it can damage both the sensor and your wall or doorframe.

To make sure that no residual adhesive stays behind, you can clean up any remaining pieces with a damp cloth or rubbing alcohol before disposing of your sensors properly in an appropriate container for recycling or hazardous waste disposal.

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