This recall has not yet been classified by risk level.
System Sensor Recalls Combination Carbon Monoxide and Smoke Detectors Due to Carbon Monoxide Hazard
What You Should Do
Stop using this product immediately. Do not consume, use, or distribute it.
Consumers should immediately contact System Sensor to obtain a free replacement combination CO/smoke detector. Consumers should keep using the recalled detectors until replacement detectors are installed. Options: Replace
Affected Products
This recall involves System Sensor i4 series combination carbon monoxide/smoke detector models COSMO-2W and COSMO-4W manufactured between 9/3/14 and 9/13/14. The detectors are round, white, and measure about 5.5 inches in diameter. Recalled units have date codes 4091 or 4092 printed on the lower left-hand corner of the label affixed to the back of the product and on the packaging.
Why Was This Recalled?
The detectors can fail to detect carbon monoxide gas in the home, posing a risk of carbon monoxide poisoning.
Where Was This Sold?
Distribution information not available.
About System Sensor, of St. Charles, Ill.
System Sensor, of St. Charles, Ill. has 2 total recalls tracked by RecallDetector.
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Data sourced from the CPSC. Last updated March 26, 2026. View original report