Skip to content

How to Reset Your Alarm System After a Power Outage

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

After a power outage, your home alarm system may need to be reset. Here’s a quick guide on how to do that.


Resetting your alarm system after a power outage can be a daunting task. It is important to understand the steps to prepare for a possible power outage, as well as how to reset the system once the power is restored. Preparation can be the key to a successful reset and save you time and money. In this guide, we’ll go over the steps to ensure you are prepared and can reset your system quickly.

Gather the necessary tools

When resetting an alarm system after a power outage, it is important to have the right tools. Generally, the necessary materials will include a screwdriver, a wire cutter/stripper, and appropriate replacement batteries. It is also helpful to have instruction manuals on hand for your specific system. If you are unfamiliar with wiring and electronic systems it is best to call a technician who can help safely reset your alarm system if you do not feel comfortable working on it alone.

Turn off the power to the alarm system

When the power restores after an outage, the electrical system within the alarm can become overloaded or confused. To protect the system from this kind of damage, turn off all power to it before powering on. This can be done by either unplugging the transformer from its outlet or by turning off its circuit breaker at your main electrical panel. Wait a full two minutes after turning it off before turning the system back on. This waiting period allows any potentially damaged components to discharge, protecting them from further damage.

Resetting the Alarm System

Resetting your alarm system after a power outage can be a tricky process. Depending on the type of alarm system you have, you may need to reset the control panel, or even call a professional service to do it for you. In this article, we’ll go over the different ways to reset your alarm system after a power outage and what precautions you should take before doing so.

Remove the cover of the alarm system

In order to reset your alarm system after a power disruption, you must first remove the protective cover from your control panel. This can usually be accomplished by unlocking two screws located on the bottom of the panel with a standard flathead screwdriver or drill/driver. In some cases, you may need to use a wrench or needle-nose pliers to loosen the screws depending on their type and size. Once unscrewed, carefully lift the cover off and set aside. Depending on what type of control panel you own and how it is installed, the front plate may have other components affixed to it such as a communications keypad or secondary fuse board. If present, be sure to disconnect and move these items away from the alarm system main panel prior to opening up its case.

Find the reset button

If your alarm system was powered by the local grid, a power outage can cause it to fail. To reset your alarm system and get it working properly again, you will first need to locate and press the reset button. There are several places that the reset button may be located including near the main panel, inside an external siren, or on a wireless receiver. Make sure to check your manual or contact your alarm company if you’re unsure about where to find this button.

Once you have found the reset button, press and hold it for 10 seconds and then release it. You should hear a chime coming from all of the sensors that indicate that they are working again. If there is no sound after pressing the button, try repeating this process one or two more times or contact your alarm service provider for assistance in finding and pressing the correct button.

Press and hold the reset button

If your security system’s power has been interrupted and you are unable to access it, resetting the alarm system can restore it to working order. Depending on the model of your security system, there may be a few steps required to reset the alarm after a power outage.

The most commonly used method of resetting security systems is by pressing and holding the reset button on your alarm unit. Generally located near the bottom or side of your system, this button will usually look like a red circle with a line through it or three linked horizontal lines. Press this button firmly for 2-3 seconds to restart your alarm system and return it to its default settings.

If pressing and holding the reset button does not work, check your user manual for any further instructions needed. You could also try disconnecting power from the unit by unplugging it or turning off a wall switch, waiting 5-10 seconds, then plugging or switching back on again. If all else fails, contact an electrician for help in restoring electricity safely to your home or contact customer support for assistance with any other technical issues related to restoring proper operation of your monitoring device.

Wait for the system to reset

Once power has been restored, it is important to ensure that the alarm system is reset and running properly. If the panel has a battery backup, wait for several minutes before attempting to reset the unit and performing any tests. Before resetting the system, check to make sure that all electrical wiring is connected correctly and then press the “Reset” button on the alarm system control panel. This will restore all settings to their factory defaults including erasing saved program settings and error codes along with any passcodes programmed into the system. Once this is completed successfully, test each of your components (motion detectors, glass break detectors, contact sensors) one by one using your control panel or an appropriate test device if available. After testing each component individually for functionality it is a good idea to perform a full test of all openings protected by your alarm system which can typically be done with your control panel or smartphone app. If you have multiple keypads or remotes in different locations of your home/business, be sure to also test them separately for proper operation as well. Once testing is complete and everything appears functional you can finally activate monitoring from your central station if desired.

Testing the System

After a power outage, it is important to test your alarm system to ensure that it is functioning correctly. Testing the system can help you identify any issues and also provide peace of mind. This article is going to provide you with the steps necessary in order to test your alarm system after a power outage. We will outline the proper steps to take in order to ensure that your alarm system is working correctly.

Turn the power back on

Once the notify the alarm monitoring station and repair any issues with a generator or other backup sources, you are ready to turn the power back on. This is an important step to make sure that all electrical components of your system are at full strength. Before you turn your system back on, make sure that this reset is performed in a safe area.

Turn off all breakers to the alarm system panel and then turn them back on in order for the power up sequence to take place. Once all breakers are turned on, listen for 3 beeps from the system panel indicating that it has reset successfully. Finally, test each component of your system by arming and disarming it with either a key fob or through its digital keypad. If there are any defective components, this is when they would come to light so do not skip this step! All components should register normally before declaring a successful complete reset of your alarm system after a power outage.

Test the system by triggering an alarm

Once the power has been restored and all necessary repairs made, it is time to test the system to make sure everything was connected properly and that your alarm is now operational. It is important to test the system thoroughly after any type of damage or repair in order to be sure everything is working as intended.

A simple way to test an alarm system is by triggering an alarm. Depending on the type of system, this could mean opening or closing a door or window contact in order to see if it triggers a sensor. If your system utilizes motion sensors, stand in front of one for a few seconds and wait for an activation signal.

If your system posts a notification when any part of it has been triggered, it’s important that you confirm that you are receiving these notifications from both your phone and computer devices. If any part of the system fails to trigger an alert or if the notification doesn’t appear on your devices correctly, use this information to inform further tests or necessary repairs beyond what was already performed during re-connection.

Check that the alarm sounds

After restoring power and replacing the batteries, you should ring your alarm manually to check that it works. Start by making sure all doors and windows are closed; if some are open, the alarm will not operate properly. To activate the manual test, locate the keypad near the main entrance of your house and place your finger over the buttons for several seconds and then release them. If all is functioning normally, the siren will sound for a few seconds indicating that the system is reset and ready to protect you once again.

If audible beeps or chirps come from the keypad instead of a full siren-or if no sound happens at all-check if any lights on your main control panel are displaying an error message or code. If so, refer to your user guide to troubleshoot what may be causing this issue. An indicator showing “Check” or “Trouble,” may also mean that something is malfunctioning within your system.

If no error code appears, try replacing the batteries in both your control panel and detection devices until everything is restored correctly; faulty batteries can often lead to confusion when trying to reset an alarm system after a power outage. Visually inspecting each device for any signs of physical damage (exposed wires?), dirt accumulation or insects entering into cracks can also help identify why it’s not functioning properly. Finally, make sure all wires inside each device are firmly secured; loose connections can create electrical problems for which any technical support should be able to assist you with.


If your alarm system has stopped working after a power outage, you may need to reset it. Most alarm systems need to be reset by entering a code that is either provided by the manufacturer or given to you by a professional installer. Depending on the type of alarm system and the steps you take, troubleshooting the power outage could take anywhere from a few minutes to an hour. Let’s look at some of the steps you can take to reset your alarm system and get it back up and running.

Check the batteries in the alarm system

When your alarm system is not working properly after a power outage, you may need to reset it. A good first step is to check the batteries in the alarm system. This is important, as a dead battery can cause your alarm to sound or reset itself. Furthermore, it’s wise to invest in quality batteries that will last longer and provide more reliable service. If possible, check the labels on the batteries and buy batteries of an equivalent brand and type that are sold at your local store.

Additionally, if your alarm system needs extra protection during a power outage, consider investing in backup power supply such as rechargeable sealed lead acid (SLA) batteries or uninterruptible power supply (UPS). These systems are designed to provide reliable temporary power when the main electricity supply is disrupted due to factors like a blackout or severe weather conditions. They can also be used as permanent sources of power for appliances and electronic devices if needed. After installing these supplies, test them on a regular basis to make sure they are working properly.

Check all connections and wires

After experiencing a power outage, the first step to troubleshooting your alarm system is to check all connections and wires. Ensure that nothing is loose or disconnected, and that no wires have been damaged or frayed. If there has been a disruption in power, it could lead to short circuits in the wiring system. Visually assessing all of the connections may reveal potential vulnerability – either in the form of improperly connected cables, exposed wires, or faulty components. It’s also important to make sure your alarm system is receiving constant power by testing both its main power line and individual devices connected to it. A reliable source of electricity should keep your system running uninterruptedly throughout any weather-related events or quick outages.

Contact a professional if necessary

If you have exhausted all of the troubleshooting options and are still unable to reset your alarm system after a power outage, you may need to contact a professional. Contact your local alarm system installer and describe what has happened. They should be able to help you with resetting your alarm or providing technical advice. If necessary, the technician can come to your home and reset the system for you. Replacing or repairing damaged equipment may also be necessary if there is any physical damage from the power outage.

How to Reset Your Alarm System After a Power OutageCheckout this video:

Share this Article