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How to Reset Your Honeywell 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, you may need to reset your Honeywell alarm system . Learn how to do so by following these simple steps.


Before you attempt resetting your Honeywell alarm system after a power outage, it is important to prepare for the process. First, make sure that all of your security equipment is still accessible and functional. If any of your equipment is damaged or has been moved, try to put it back in its original position before continuing. Once you’ve assessed the situation, you can begin the reset process.

Locate the master code

After a power outage, you will need to reset and reprogram your Honeywell alarm system in order to regain access and functionality. Before resetting the system, you must first locate the master code. This code is required in order to reprogram your system.

The master code is typically four digits long, but it can range from three to seven digits depending on which model of Honeywell alarm system you own. If you are having difficulty locating the master code, refer to your alarm system’s user manual or contact Honeywell customer service for assistance. Once you have located the master code, follow these steps:

1. Start by entering “Installer Code” on the keypad of your alarm system. This will allow access into programming mode – typically starting with “20.”
2. Enter the four-digit master code for this system – or whatever length matches your particular model’s owner-assigned code from its factory settings — followed by 5 (for example: 1234-5).
3. Talk with local Honeywell expert or customer service representative to ensure proper resetting takes place and all programmable functions, codes and events are set appropriately for optimal performance with existing set up before logging off programming mode (use “99” command) and powering down device when finished reconfiguring settings.

Gather the necessary tools

Before you begin, you’ll need to gather the necessary tools to reset your Honeywell alarm system after a power outage. The most important tool you’ll need is the user manual for your system. You can find the user manual for both wired and wireless systems on the Honeywell website. Gather the appropriate tools for each type of system.

For wired systems:
-Pen or paperclip
-Flathead screwdriver
-Panel battery

For wireless systems:
-User manual
-Alarm panel keypad or remote control unit
-Battery that matches the type used in your alarm panel (if applicable)
-Adhesive tape (optional)

Resetting the Alarm

Resetting your Honeywell Alarm System after a power outage is a straightforward process that takes only a few minutes to complete. This guide will help you get your system back up and running quickly. Honeywell Alarm Systems are known for their reliability, making them a popular choice among homeowners. Let’s take a look at the steps needed to reset your system after a power outage.

Disarm the system

If your Honeywell alarm system has powered down due to a power outage, you may need to reset the alarm. The first step is to disarm the system by entering your custom four-digit code followed by the ‘Off’ button. You should hear a beep notifying you that the system is disarmed. If you do not enter your code correctly, or cannot remember it, contact an authorized Honeywell service provider for assistance.

Press and hold the reset button

In order to Arm and Disarm After a power outage, you will need to locate the reset button on your Honeywell alarm system’s Control Panel and press and hold it until you hear a “chime.” Once the chime is heard, the system should be reset and functioning normally again.

When the power returns, your system should automatically activate with a blinking Trouble light. To acknowledge or clear any issues that may have arisen when the power was disrupted – like low battery warnings or zone fault detection – you must perform any necessary steps.

Once these are addressed, press and hold the RESET button on the Control Panel for at least two seconds before releasing it to Arm and Disarm your system with all its original settings intact. When you hear a distinctive chime sound, your system should be back online and ready for use as normal. It is important that you make sure all of the zones on your Control Panel are displaying correctly before leaving since some alarms may not indicate faulty zones until they are specifically tested.

Enter the master code

Whenever your Honeywell alarm system loses power due to a power outage, you will need to reset it in order to get it up and running again. To do so, you must enter the master code.

The first step is to power up the system by plugging in the transformer. Once powered, press the [Off] button on your keypad and wait for 10-15 seconds for the system reset to take place. Now use your [Master Code] (the default is 1234) and press [#]. Your alarm will beep 3 times indicating that you have successfully entered the code. Then press [*], followed by 2, which will set off two beeps – these sound alarms are your way of knowing that you have successfully entered a new code if needed

Next, enter in your user access code and press [*] then 9 and follow with (#). Your panel should now read “Ready” and be ready for arming according to your settings. After this simple process is done, you’re all set and can arm/disarm as usual when entering/leaving your home or building.

Reprogramming the System

Resetting your Honeywell alarm system after a power outage is an important part of keeping the system up and running. Reprogramming the system will ensure that the alarm system is operating correctly and all of the settings, such as the alarm codes, are properly set. In this section we will discuss how to reset your Honeywell alarm system after a power outage.

Access the programming mode

In order to Access the main programming mode of your Honeywell alarm system, it is necessary to enter the correct sequence of keystrokes. To do this, start by pressing the [CODE] key on the keypad followed by [OFF], then press and hold down the [#] key. After 10 seconds, you will hear a single beep and have Access the main programming mode. During this time, you will also see that two of the alarm system lights-one red and one green-are lit up continuously. At this point, you are now ready to reset your system after a power outage.

Change the master code

Changing the master code on your Honeywell alarm system is a simple process. However, it’s important to remember that changing the master code will also deactivate any spring latch locks that you have installed. To Access the Programming and reset your system following a power outage, here are the steps:

1. Make sure the keypad is lit up after the power comes back on.
2. Enter “*8” and then enter your current 4-digit code
3. Select “2” for Security Code from the menu
4. Enter your new 4-digit security code twice
5. You should see a confirmation message indicating that your new security code has been accepted
6. Press *99 or press and hold # for 3 seconds to exit Access the Programming mode and activate the new settings
7. Test out your new security code (include all user codes if you’ve changed them) by entering it into the alarm panel keypad
8. Re-enter all of your system’s settings such as sensors, access codes, intrusion zone settings and contact numbers as needed

Update the system settings

After a power outage, the settings of your Honeywell alarm system may be outdated. To reset these settings, you’ll need to access the main user menus. First, look for a small triangular icon on the keypad display and press it. This will bring up the user program menu. Once here, you’ll be able to update settings including:
-Alarm volume
-Keypad sound levels
-Home security alarm status
-Entry and exit delays
-Door chime settings

Remember that any changes you make to the system should always be tested first before fully activating them. Make any necessary adjustments and confirm that each setting is working correctly. After all settings have been updated, then reset your alarm system by pressing “Reset” from the main menu and enter your personal code to start using your newly updated alarm system!


After a power outage, it is essential to test your Honeywell Alarm System in order to ensure proper functioning and safety. In this article, we will go over the steps for Adjusting the Volume of your alarm system after a power outage and why it is so important.

Arm the system

After restoring power to your Honeywell system, you must now arm the system for it to be able to detect any alarms. This is a straightforward process and should take no more than a few minutes.

First, you will need to enter your code on the main panel. This code can be found in the user manual, and if you don’t know it already, it will vary depending on your model. Once this is done, the display will indicate that the code has been accepted and is ready to be armed.

Next, press the “Arm” or “Away” button on either your keypad or on your remote, whichever device you have set up with your alarm system. You may be prompted with a message asking if you want to stay or if everyone has left and are away from home. Select either option depending on what works best for you at that time.

Once selected, all doors and windows connected to the security system will need to be closed before arming is complete. The green status light in the control panel should turn on after everything is closed properly indicating that everything has been set and armed correctly by – turning off all of its lights (except for one) once complete. Your Honeywell alarm should now be ready for use!

Trigger the alarm

Once the power has been fully restored, you will need to trigger the alarm to verify that all components have been reset and are functioning properly. Depending on your system, you may need to either reset your Honeywell alarm code via your keypad or enter it from another external device, such as a smartphone. In the event that you encounter an error message on your control panel after a power outage, we recommend first checking for an alarm system reset option in the menu before attempting a manual override.

If your Honeywell alarm code or reset button is not working as it should, then you can also try manually triggering the alarm. To do this, press and hold both the Exit and Reset buttons simultaneously until the red LED lights up. Alternatively, some Honeywell alarms are equipped with remote triggers; if so, select this option and follow the instructions provided. Following any of these methods should cause a loud chirp or beep indicating that successful operation has been achieved; however, if no sound is made upon testing or if any errors persist after following steps outlined above, then contact Honeywell support services for further guidance on how best to proceed.

Reset the system

Resetting the system after a power outage is a critical part of maintaining your Honeywell alarm system. To do this, locate the main control panel of your system. It should be easy to identify, as it will usually be the source of the power input to the other components of your Honeywell alarm system.

Once located, open up the control panel and take out its battery. Wait for five seconds before inserting it back and then close up the control panel. Your system is now reset and can be controlled by following all of its menus on screen again, just as you did when setting it up initially. Do not attempt to tamper with any other devices connected to your Honeywell alarm before resetting, as this may result in them being switched off entirely or further damaging your system’s settings.


If your Honeywell alarm system has stopped working after a power outage, you may need to reset it. This process can be a bit tricky, so it’s important to follow the steps carefully. In this section, we’ll provide step-by-step instructions on how to reset your Honeywell alarm system after a power outage. This will help you get your system back up and running quickly and efficiently.

Check the wiring

If your Honeywell alarm system fails to power on after a power outage, the first step is to check the wiring. Make sure all of the wires connected to your alarm control panel are securely connected and in good shape. If your alarm system has a Backup Battery, make sure it is installed as specified in the user manual. It may also be necessary to reset the battery by disconnecting it for a few seconds and then reconnecting it. After you’ve checked all of the wiring, try powering on your alarm system again.

Replace the backup battery

When power is restored after a power outage, the alarm system must have the correct voltage applied to restore it to proper operation. The alarm system is powered by your home’s electricity, but also uses an auxiliary or backup battery in case of power outages and electrical disturbances. Depending on the type of system you have installed, voltage and battery size can vary. It is important to replace the backup battery as soon as possible after a power outage to ensure that your system remains secure.

To replace the backup battery, locate it within the control panel and remove it from its housing. Carefully disconnect the old battery once removed and unpack the new battery making sure to note if any polarity is marked on it. Once you have identified any correct polarity, align and connect the new replacement battery accordingly before securing in place inside of your control panel. After reassembly, reset your Honeywell alarm system by pressing ***#*** on your keypad, followed by entering in “####” which will reset certain settings and restore operation back to normal post-power outage conditions.

Contact a professional

If your Honeywell alarm system has been reset after a power outage but is still not responding appropriately, contact an experienced security professional to inspect and further troubleshoot the system. The professional can make sure the system is powered properly and running correctly. They can also check that all of the connections and components are working as intended. A qualified technician will also be able to provide you with expert advice on any updates or improvements you may need to make to ensure optimal security.

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