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Carbon Monoxide (CO) Alarms Don't Last Forever

How old is your alarm?

CO alarms monitor your home 24 hours a day, 7 days a week, and are designed to provide accurate readings for the life of the alarm. However, like most appliances, they don’t last forever.

Is your alarm beeping?

Seven years after initial power, a Kidde CO alarm will begin sounding an end-of-life warning every 30 seconds. You’ll know it’s not a low battery chirp because replacing a battery won’t stop it. It will stop only when the alarm is out of power. Find out if your beeping alarm is in end-of-life.

End-Of-Life Warning: Required for your safety.

In 2009, Underwriters Laboratories (UL), the independent third-party agency that tests CO alarms, began requiring an end-of-life warning to alert homeowners when their CO alarm has reached the end of its useful life. As part of its commitment to safety, Kidde has included this feature in all of its CO alarms since 2001. All Kidde CO alarms have a proven life of seven years.

If you think your CO alarm is nearing its seven-year mark, replace it today.

Important Note! CO alarms do not detect the presence of CO when in end-of-life mode

The following states enacted CO legislation in the past, so End-Of-Life warnings will begin soon. Check the below Laws & Legislation Map for current information on your state.

   Law Effective Date: CO Alarms Will Expire:
New York City  2004  2011
 Vermont  2005  2012
 Connecticut  2005  2012
​ Massachusetts 2006​ ​2013
 Illinois  2007  2014
 Minnesota  2007  2014

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Kidde Worry-Free (CO) alarms offer 10 years of continuous detection from the leading cause of accidental poisoning deaths in America – carbon monoxide.