What does it mean when my First Alert Onelink Environment Monitor keeps chirping?

It is likely that the reason your smoke environment monitor keeps chirping and beeping is that the battery is low . Five (5) chirps indicates the End of Life. If your product is in End of Life mode, replace the device immediately. If you hear three (3) chirps, this could mean the device is in a malfunction mode. If your device is in malfunction mode please contact customer support to help troubleshoot. Other reasons your device may be chirping are as follows:

  1. A different device or appliance such as a security system, monitor, carbon monoxide alarm, or other device which has a similar low battery or alert signal.
  2. Some of the same factors that cause unwanted alarms can cause intermittent alarms: dust and insects in the alarm or power interruptions in hardwired alarms.