Some hardwired smoke and carbon monoxide alarms made by Kidde are being recalled across North America.

1.5 million smoke alarms recalled in Canada

Alarms may appear to be in working order but will no longer detect smoke or carbon monoxide

Even if your smoke alarm appears to be in working order, it could be defective.

Kidde United Technologies is recalling 1.5 million smoke alarms in Canada and another 3.6 million alarms in the Unites States.

The recall involves the Kidde NightHawk hardwired talking combo smoke and carbon monoxide alarm and includes the models with battery backup and without. Model numbers include KN-COSM-IBCA and  KN-COSM-ICA with manufacture dates between June 1, 2004 and Dec. 31, 2010.

The reason for the recall is that when the alarms reach the end of their lifespan they signal with a chirping noise every 30 seconds. If the power supply (including the battery) is removed from the device and then restored, and the test button is pressed within 10 seconds, the unit will no longer issue the end-of-life chirping signal. Such action may lead owners to believe the unit is still in working order, but at this point the alarm will no longer detect smoke or carbon monoxide.

No injuries have been reported from faulty devices.

For more information contact Kidde by phoning 855-239-0490 or go online at and click on “Product Safety Notice.”

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