This year, millions of alarms will reach its end-of-life.

Many states adopted CO legislation in 2011 – 2012
CO & Combination alarms had featured sensors with 7-year life
Time's up -replace the alarm

How to Know It’s Time to Replace

Alarm Chirps

BRK/First Alert CO or Combination alarms will chirp 5 times with 5 green LED flashes once per minute. These chirps will not stop even if batteries are replaced.

How to Know It’s Time to Replace

Date Code

Check the back of the alarm for the manufactured date code. If the date is coded in year 2011 or prior, the alarm needs to be replaced.

Is Your State Affected?

The states highlighted in blue will be affected by the CO & combination alarm end-of-life cycle. Click here for the interactive legislation map and to view the code.

Find The Alarm That Works For You...

Hardwired CO & Combination Alarms


Carbon Monoxide
CO5120BN
Carbon Monoxide
CO5120PDBN
Smoke & CO Combination
SC9120LBL
Smoke & CO Combination
SC9120B
Smoke & CO Combination
SC7010B
Smoke & CO Combination
SC7010BV


Battery Operated CO & Combination Alarms


Carbon Monoxide
CO511B
Carbon Monoxide
CO400B
Carbon Monoxide
CO410B
Carbon Monoxide
CO250B
Carbon Monoxide
CO910B
Carbon Monoxide
CO710B
Smoke & CO Combination
PRC710B
Smoke & CO Combination
SCO2B
Smoke & CO Combination
SCO500B
Smoke & CO Combination
PRC700VB
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