First Alert Alarm Keeps Going Off: Troubleshooting Tips And Solutions

First Alert SA320CN Smoke Alarm with Smart Sensing Technology and
First Alert SA320CN Smoke Alarm with Smart Sensing Technology and from


Having a reliable alarm system is crucial for the safety and security of your home or office. However, it can be frustrating when your First Alert alarm keeps going off for no apparent reason. In this article, we will explore some common reasons why this might be happening and provide you with troubleshooting tips and solutions to resolve the issue.

1. Check for Low Battery

One of the most common reasons why your First Alert alarm keeps going off is due to a low battery. Ensure that the battery is properly installed and replace it if necessary. It is recommended to replace the battery every 6-12 months to prevent false alarms.

2. Test the Alarm

If you are experiencing frequent false alarms, it is essential to test the alarm to ensure it is working correctly. Follow the manufacturer’s instructions on how to perform a test. If the alarm fails the test, contact First Alert customer support for further assistance.

3. Clean the Alarm

Dust, dirt, and debris can interfere with the proper functioning of your alarm system. Regularly clean the alarm using a soft, dry cloth to remove any build-up. Be careful not to use any cleaning agents or water as this can damage the alarm.

4. Check for Interference

External factors such as radio frequencies, electrical appliances, or even nearby construction work can cause interference with your alarm system, leading to false alarms. Ensure that there are no potential sources of interference near the alarm.

5. Adjust the Sensitivity

Some First Alert alarms have adjustable sensitivity settings. If your alarm is too sensitive, even minor disturbances can trigger it. Refer to the user manual to determine if your alarm has this feature and adjust it accordingly to reduce false alarms.

6. Ensure Proper Installation

Improper installation can cause your First Alert alarm to go off randomly. Make sure that the alarm is securely mounted to the wall or ceiling and that all connections are tight and secure. If you are unsure about the installation, consult a professional.

7. Update the Firmware

Outdated firmware can sometimes cause glitches in the alarm system, leading to false alarms. Check the manufacturer’s website for any available firmware updates and follow their instructions to update your First Alert alarm.

8. Reset the Alarm

If none of the above solutions work, try resetting the alarm to its default settings. This can be done by following the instructions provided by First Alert. Keep in mind that resetting the alarm will erase any customized settings, so be sure to note them down before performing the reset.

9. Contact Customer Support

If you have tried all the troubleshooting tips mentioned above and your First Alert alarm still keeps going off, it is recommended to contact First Alert customer support. They will be able to provide you with further assistance and guidance to resolve the issue.

10. Regular Maintenance

To prevent future issues with your First Alert alarm, it is important to perform regular maintenance. This includes checking the battery, cleaning the alarm, and ensuring that all components are in good working condition. By maintaining your alarm system properly, you can minimize the chances of false alarms and ensure its effectiveness in alerting you to potential dangers.


Dealing with a First Alert alarm that keeps going off can be frustrating, but by following these troubleshooting tips and solutions, you can resolve the issue and restore the functionality of your alarm system. Remember to always prioritize the safety and security of your home or office by regularly maintaining your alarm system and seeking professional help when needed.