Affected smoke alarms were sold at Menards, Home Depot, Walmart, other similar stores and on Amazon.com between September 2016 and January of this year for between $20 and $40.
If the yellow cap is present, the Kidde dual-sensor smoke alarms, models PI2010 and PI9010, should be replaced.
Kidde dual sensor smoke alarms, models PI2010 and PI9010 are included in the recall. 10 through 2017 October 13.
Without having the ability to detect smoke, the smoke alarm may not be able to alert people of a fire.
Consumers should not try to remove the cap or fix the alarm, Kidde says. Do not attempt to take apart the alarm, open the casing, or otherwise remove the yellow cap yourself, the recall states.
About 452,000 units were sold in the US and another 40,000 were sold in Canada.
If you have one of these alarms, contact Kidde toll-free at 1-833-551-7739 from 8:30 a.m.to 5 p.m. ET Monday through Friday and from 9 a.m.to 3 p.m. on weekends.
Kidde received one report of the cap being present on an alarm before it was installed.
If the yellow cap is not present, the smoke alarm is safe to reinstall and continue to use without restriction. There have also been no known reports of injuries or incidents related to the recall.