Carbon monoxide detector sold on has alarm malfunction; CPSC

226,000 smoke-carbon monoxide alarms recalled - ABC News

Non-working smoke alarms during pellet stove malfunction in Sturbridge

Universal Security Instruments Recalls About 8,000 Smoke & CO Detectors Due to Failure to Alarm at Dangerous CO Levels

Millions of smoke and carbon monoxide detectors recalled

Defective carbon monoxide detector alert

How Many Carbon Monoxide Detectors Should You Have?

Some carbon monoxide detectors sold on don't work, CPSC says

Have a question about Kidde Firex Plug-in Carbon Monoxide Detector, 9-Volt Battery Backup and Digital Display, CO Detector? - Pg 3 - The Home Depot

A Child's Combo Smoke And Carbon Monoxide Alarm Has Been Recalled And It's A Safety Issue

Carbon monoxide alarm recall: Universal Security Instruments

BRK First Alert - CO5120BN Hardwire Carbon Monoxide Alarm with Battery– Wholesale Home