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Why would an electric smoke detector periodically chirp or beep?

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because generally they have a battery backup, and it's telling you the battery is low or dead.

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A electric smoke detector will check itself with a beep are chirp. It also lets you know that when the power is off it will still work.

even though it is hard wire to your electircal you still need to replace the 9 volt battery at least once a year or the chirp and beep will continue they are still battery back up

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Why would an electric smoke detector periodically chirp or beep?

even though it is hard wire to your electircal you still need to replace the 9 volt battery at least once a year or the chirp and beep will continue they are still battery back up

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