Smoke & CO Detectors

Carbon Monoxide Detector Beeping

A CO detector may signal a low battery, the end of its service life, or the presence of carbon monoxide.

Safety first

If a CO alarm is sounding continuously, or anyone feels dizzy, nauseated, or has a headache, leave the home immediately and call 911.

Step-by-step instructions

  1. 1

    If the alarm sounds continuously or anyone feels dizzy, nauseated, or has a headache, leave immediately and call 911.

  2. 2

    For a single chirp every 30–60 seconds, it usually means a low battery.

  3. 3

    Replace the battery and press Test.

  4. 4

    Check the manufacture date—detectors expire and need replacing.

  5. 5

    If it still chirps or shows 'End of Life,' submit a request.

How-to video

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