How do I stop my carbon monoxide alarm from beeping in the end of life?The way to get a carbon monoxide alarm to stop chirping is to replace the battery.
How do I know when my First Alert smoke detector expires?Look at the back of the alarm for the date of manufacture. Smoke alarms should be replaced 10 years from the date of manufacture. Combo smoke/CO alarms should be replaced after 5-7 years (depending on the model). Put the alarm back on the ceiling or wall if it is less than 10 years old.
How long do First Alert CO monitors last?What Does an End-of-Life Beep From My Detector Mean? Most carbon monoxide alarms last between 5 and 7 years. Even if the battery is still good, all detectors should be replaced after 7 years.
How do I know if my carbon monoxide detector is dying?Carbon monoxide alarms alert you with four beeps. A single chirp means the battery is low or the detector should be replaced.
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