Here's a particularly bad product to malfunction. The U.S. Consumer Product Safety Commission announced a recall of FireX Branded 10000 Series Carbon Monoxide (CO) Alarms and 12000 Series CO/Smoke Combo Alarms. The recall affects about 280,000 units. The recalled alarms can sound a “double chirp”/fault alarm in the presence of CO prior to going into full alarm. Upon hearing a double chirp, the owner’s manual instructions recommend a consumer take the alarm out of service, which could expose consumers to hazardous levels of CO, causing injury or death. The recall includes FireX branded 10000 and 12000 series alarms with item numbers 10000, 12000, 12000C, 12000-6, 12200, 12220, 12400, 12400C manufactured between June 1, 2007 and February 1, 2008. The date code appears on the back of the unit with a four-digit year and three-digit month followed by the day (ex: 2007JUN1 for June 1, 2007). Units with a manufacturer date code prior to June 1, 2007 are not included in this recall. Consumers should contact Maple Chase at (888) 879-3906 for a free working replacement.