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Why is my FA3322 beeping?

General

23 April 2026

A single chirp typically means low battery, though the FA3322 has a sealed 10-year battery so this usually indicates the unit is reaching end of life and needs replacing. A repeated alarm pattern with red LED means CO has been detected. Sleep Easy mode can silence low-battery chirps for 8 hours overnight. See our CO alarm beeping guide to identify the specific pattern.

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