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Why is my smoke alarm chirping if it’s hard wired?.What does flashing green light mean on First Alert smoke detector?.

Why did my smoke alarm go off in the middle of the night?.Why did my smoke detector go off for no reason?.How long will a smoke detector chirp before it dies?.When should smoke detector batteries be replaced?.How do I know if my smoke detector battery is low?.Why is my fire alarm blinking red and green?.How do I know if my smoke detector needs a new battery?.How do you reset a hardwired Kidde smoke detector?.How do I know if my Kidde carbon monoxide detector is working?.What does it mean when smoke detector is flashing red?.What does blinking red light on smoke detector mean?.