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  1. Five beeps from a First Alert smoke detector indicate the following1234:
    • The alarm is at its end of life (EOL). This should not happen for about 5-10 years after the date of manufacture.
    • To troubleshoot, try a factory reset.
    • If the unit still chirps after trying all the steps, replace the batteries.
    Learn more:
    Five chirps indicate that the alarm is at its end of life (EOL). This should not happen for about 5 years after the date of manufacture. To troubleshoot this issue, try these steps. Factory reset the unit If the unit still chirps after trying all the steps above, try a factory reset.
    support.firstalert.com/s/article/smart-home-chirping
    Five chirps indicate that the alarm is at its end of life (EOL). This generally should not happen for about 10 years. To troubleshoot this issue, try these steps. Factory reset the unit If the unit still chirps after trying all the steps above, try a factory reset. After your Safe & Sound restarts and turns blue, pair it with your mobile device.
    support.firstalert.com/s/article/Troubleshoot-Safe-S…
    1 Beep Every Minute:Low Battery. It is time to replace the batteries in your carbon monoxide detector. 5 Beeps Every Minute:End of Life. This type of chirp indicates it is time to replace your carbon monoxide alarm.
    www.firstalert.com/us/en/safetycorner/what-does-t…
    Chirping in newer alarms is most commonly caused by a low battery. We recommend discharging your alarms and replacing the batteries to eliminate this type of chirping. Here’s how: To discharge the alarm, unscrew it from the wall or ceiling and take out the old batteries. Then press and hold the Test/Silence button for at least 10 seconds.
    support.firstalert.com/s/article/find-the-chirp
     
  2. Why Does My Smoke Detector Beep 5 Times? (Read This First!)