Most hard-wired smoke detectors include a 9-volt backup battery that's supposed to kick in if your home loses electricity. If that battery is running low, your detector alerts you with a high-pitched beep.
Why is only one smoke detector beeping?
If a smoke alarm is chirping consistently, one of the following may be the reason: The battery may need to be replaced. An alarm will chirp every 30 to 60 seconds for a minimum of seven days. With a "low battery" announcement, disconnect the unit and replace the batteries.
How do you get a smoke alarm to stop chirping?
Resetting the Alarm
- Turn off the power to the smoke alarm at the circuit breaker.
- Remove the smoke alarm from the mounting bracket and disconnect the power.
- Remove the battery.
- Press and hold the test button for at least 15 seconds. ...
- Reconnect the power and reinstall the battery.
