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Battery-operated Carbon Monoxide Detector

First Alert Battery-operated Carbon Monoxide Detector

4.6
2255
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78 Questions
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What does it mean when it starts to beep


4 beeps means CO alarm. 1 chirp per minute-replace battery. 3 chirps per minute-malfunction. 5 chirps per minute-end of life-replace alarm.

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One of mine just reached end-of-life. Was initially installed 9/15/13. This morning, started emitting 5-beep sequence, indicating 'end of service.

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A loud 85-decibel alarm sounds when carbon monoxide levels reach dangerous levels.

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