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How to Reset Your Honeywell Alarm System After Changing the Battery

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

If you have a Honeywell alarm system , it’s important to know how to reset it after changing the battery. This quick and easy guide will show you how.


After replacing the batteries in your Honeywell alarm system, you must reset it for it to continue to function properly. Resetting your Honeywell alarm system requires a few steps and less than five minutes of your time. Once the reset is complete, your alarm system will be ready for proper use again. It’s important to understand how to correctly reset a Honeywell Alarm System after changing the battery so that it operates precisely as needed when an emergency arises. Follow this guide to learn exactly how to reset your Honeywell Alarm System after changing the battery:


When attempting to reset a Honeywell alarm system after changing the battery, it is important that you are familiar with the setup and configuration of your system. It is also necessary to have all the necessary tools and equipment ready to make sure the resetting process runs smoothly. Let’s go over what you need to do to prepare for resetting your Honeywell alarm system.

Gather the necessary tools and materials

Before you begin resetting your Honeywell alarm system after changing the battery, it is important to ensure you have all the necessary tools and materials on hand. Since this procedure involves both mechanical and electrical components, a combination of common tools plus appropriate protective equipment should be gathered before beginning.

Tools needed will include: an adjustable wrench or pliers, a digital multimeter or voltmeter, an insulation tester, screwdriver(s), wire strippers, ruler/measuring tape, ladder (if necessary).

Materials needed will include: new Honeywell Alarm System Battery and/or Fuse(s), wiring components such as cables and wires. Additionally, you may require “block connectors” or junction boxes if laying wiring over long distances.

All tools and any materials needed should be laid out before starting the reset process to ensure efficiency in completing the changeover of power source from main AC power to backup DC battery-powered circuit. As always when working with electrical wiring and connections inside your home’s consumer units and electrical panels, please be sure to use extreme caution when engaging live circuits.

Familiarize yourself with the Honeywell alarm system

Before attempting to reset your Honeywell alarm system after changing the battery, it is important to familiarize yourself with the system to ensure a successful reset. Make sure you are aware of which buttons need to be pressed, as these may vary based on the type of alarm system you have. Furthermore, some Honeywell alarm systems allow for custom configurations and programming, so be sure you know what settings or modifications have been made before attempting to reset the system. Additionally, identify which method of powering your Honeywell alarm system is being used (e.g., battery only or AC power source). If you’re not sure how your Honeywell alarm system is powered, double-check before proceeding with the reset process. Lastly, check that all accessories connected directly to your Honeywell alarm system (e.g., keypads and key fobs) are powered up and functioning properly before starting the reset process.

Reset the System

Resetting your Honeywell alarm system after changing the battery is an important step in ensuring that your system is secure and operational. In order to properly reset your system, you will need to follow a set of steps that are tailored to the specific model of alarm panel you have. This guide will walk you through the process of resetting your system after changing the battery.

Disconnect the power source

To reset a Honeywell alarm system, the first step is to disconnect the power source. This can be done by turning off the power at your circuit breaker that supplies power to the alarm system, or you can remove the wires from their sources on your control panel. Once you have done this, leave it for at least 60 seconds before reconnecting. It is important to note that this process may vary if you are using multiple zones so check your user manual for specific instructions. Once you have successfully disconnected and reconnected your power source, use the following steps to reset your Honeywell alarm system.

Remove the old battery

Before you proceed with the reset process, it’s important to ensure that the old battery has been fully removed from the system. To do so, locate and open the control panel by accessing its tamper switch at the top. You should now be able to easily access and remove any connected batteries within. Make certain that any loose wire connections are tightened as necessary in order to prevent any possible shorts. Use a Phillips head screwdriver to loosen/tighten these throughout. Once finished, replace the cover and click back into place with a new battery securely connected into its slot(s) as needed.

Install the new battery

Before attempting to reset your Honeywell alarm system after changing the battery, make sure to connect the new battery correctly. The positive and negative terminals need to be connected correctly. Once you’ve securely connected the new battery, the keypad may momentarily display a ‘Low Battery’ fault followed by a period of silence where it will then sound ‘beeps’ during a brief self-test. If your existing installation has both primary (mains) and back-up (battery) power sources, install the replacement battery/rechargeable cells as required. To ensure total system reliability, you should use quality back-up cells with an appropriate service life expectancy. In addition, it is important to follow all safety requirements and recommendations when installing or replacing batteries – including following applicable regulations regarding proper disposal of old power sources.

Reconnect the power source

Reconnect the power source to your Honeywell alarm system after you have replaced the system’s battery. Locate the main AC transformer and plug it firmly into the wall, then connect it to the “AC” terminal on your alarm control panel. Additionally, make sure to plug in the phone cord that connects your alarm system to your telephone service.

Next, press “* 99” on your Honeywell keypad to enter programming mode. Then enter “0700” followed by your four-digit master code and press “#.” This will put you into user programming where you can reset or edit sensor settings, change fixed display programming, set relay functions and more.

You can also clear any existing trouble conditions by pressing “* 91” on the keypad and then entering master code plus two zeros (for example 0000) and pressing “#.” This will reboot and reset your Honeywell system so that it is ready for arming and disarming of sensors in order to protect against home invasions or other emergencies as needed. To locate the main AC transformer, simply plug it firmly into the wall before connecting it to the “AC” terminal on your alarm control panel.

Enter the programming code

After the new battery has been installed and the green power light on the control panel is illuminated, the system must be reset. To do this, press the [CODE] button twice quickly followed by your four-digit programming code. The keypad should display “Program Mode” if entered correctly. If you cannot remember your code, it may need to be reset to factory defaults. Refer to your user guide or contact a local alarm service provider for assistance in resetting your code if necessary.


It is important to reset your Honeywell alarm system after you have changed the battery to ensure that it is working properly. By doing this, you can rest assured that your security system is up and running without any hiccups. In this article, we have provided step-by-step instructions you can use to reset your Honeywell alarm system after changing the battery. We have also highlighted some of the key tips to consider when resetting your alarm system. Now that you have come to the end of this article, let’s summarize the key points.

Tips for troubleshooting

If the Honeywell alarm system does not reset after changing the battery, it is likely you are having a problem with one of the system’s sensors or components. Here are some tips for troubleshooting before calling a technician:

1. Verify that all door/window sensors and motion detectors are securely in place and have been linked properly to the control panel.
2. Check that doors and windows are securely shut, but not locked – an open window or door can activate an alarm without its being detected by a sensor.
3. Test all sensors to make sure they are working correctly.
4. Make sure no prohibited objects (such as metal objects) interfere with radio signals from wireless console keys, wireless keypads and other wireless components of the alarm system.
5. If any issues arise during reset attempt, check telephone line connections to ensure volts going through both ends of the line is present by using telephone testing tool or multimeter – volt measurement must be between 9-12 V DC volts for panel to properly register .
6..If necessary, talk with your provider about other solutions for keeping power to the alarm system consistent such as adding back-up power supply unit or battery monitoring systems if applicable in your area so potential disruptions do not affect sensitivity settings of your device over time

Further resources

If you are still having trouble resetting your Honeywell alarm system after changing the battery, there are a few additional resources that may be helpful. The Honeywell website offers many resources including installation and user manuals, instruction videos, and frequently asked questions. If you need more help, the company also provides technical support services with knowledgeable agents available during normal business hours. You can find the contact information for these services on the Honeywell website. Additionally, there are many third-party companies offering specialized help with home alarm systems that you can contact to assist with further troubleshooting.

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