fire alarm beeps 3 times?

Smoke Alarm Malfunctioning 3 Chirps Not BEEPS After New Battery

Smoke detectors beep three times when they go into alarm mode. The beeping is a repeating pattern of three beeps and a pause. This pattern is common with all smoke detectors. The three beeps are caused by smoke, steam, or dust trapped inside the smoke detector.

Why does my smoke alarm keep beeping 3 times?

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