Millions of Kidde-brand smoke and CO alarms recalled

NEW YORK — Millions of dual smoke-CO alarms are being recalled because they may fail to warn users that their batteries have reached their limit, making users think -- incorrectly -- that the detectors still work.

Kidde NightHawk issued the recall Thursday of its combination smoke/carbon monoxide alarm with model number KN-COSM-IB. The detectors have manufacture dates between June 1, 2004, and Dec. 31, 2010, the company said.

Some 3.6 million alarms are recalled in the U.S. with another 1.5 million alarms sold in Canada.

"The alarm can fail to continue to chirp when it reaches its seven year end of life if the batteries are replaced, leading consumers to believe it is still working," the company said.

That puts residents at risk of not knowing if there is a fire in their home or if elevated levels of carbon monoxide are present.

From the company:

The alarms are hard-wired into a home’s electric power. The unit has a compartment on the back for the installation of a replaceable 9V backup battery. The alarm is white, round and measures about 5 to 6 inches in diameter. “Kidde” is engraved on the front of the alarm. “Kidde,” the model number and manufacture dates are printed on a label on the back on the alarm.

There have been eight reports of incidents connected with the recalled alarms, which were sold at stores nationwide and online at Amazon.com from June 2004 through December 2010.

The company did not elaborate on the details of those incidents. No injuries have been reported.

Those who have the recalled alarms in their homes are told to immediately stop using them and contact Kidde directly for a free replacement or a discount on a new alarm.