Kidde is recalling its NightHawk combination smoke/carbon monoxide (CO) alarms.

The alarm can fail to chirp once it reaches its seven year end of life if the batteries are replaced.

This can lead people to believe the alarm is still working, when it is not. People with the recalled alarm risk not being alerted to a fire or carbon monoxide issue in their home.

The recall is for Kidde NightHawk talking combo smoke/CO alarm with model number KN-COSM-IB and manufacture dates between June 1, 2004 and December 31, 2010. You can find more details here.

The recall covers about 3.6 million alarms in the U.S. and another 1.5 million in Canada. The alarms were sold at stores nationwide and online at from June 2004 through December 2010.

Kidde has received reports of 8 incidents involving the alarms. No injuries have been reported.

If you have one of the recalled alarms, stop using it. You can contact Kidde for a free replacement or discount on a new alarm. You can find more details here.

You can also call Kidde at 855-239-0490 or visit the company’s website at