CPSC campaign 04534
Hazard
The recalled units fail to detect carbon monoxide after 1 year of operation, due to an internal software error. These CO alarms do not provide an "end of life" signal or other indication of inoperability, even if the test button is depressed.
Remedy
Consumers should contact their system installer or service provider to arrange for the free installation of a replacement CO alarm.
The text above is quoted verbatim from the CPSC record. Confirm the affected units and the remedy with the manufacturer or CPSC. Recall data may be incomplete, delayed, or superseded.