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Why does my smoke alarm chirp intermittently?

The same factors that cause unwanted alarms can cause intermittent alarms: dust, insects, and power interruptions. The "chirp" may also be caused by: Security systems, monitors, carbon monoxide alarms, and other devices have similar low battery or alert signals. Many smoke alarms have a low battery chirp to alert you to change the battery when it's power is running low. Alarms will chirp every 5 seconds if the interconnect wire is grounded. The common problem to a smoke alarm chirping is when it needs to be replaced, which is every ten years.

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