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Kid playing in his room with a Kidde Carbon Monoxide detector in the background.

When Your Carbon Monoxide Alarm Displays a Number with No Alarm

Any time a digital unit displays a number with or without an alert, assume it senses carbon monoxide. Leave the home and call 911.

Family in the kitchen cooking with a Kidde Combination alarm overhead to help detect Smoke or Carbon Monoxide incidents.

Why Should I Have a Combination Alarm?

Combination alarms save space in your home, and they mean you only need to test and change batteries in one device rather than two.

Kid playing in his room with a Kidde Carbon Monoxide detector in the background.

When and How Do I Replace My Carbon Monoxide or Combination Alarm’s Battery?

Follow our simple steps for carbon monoxide detector battery replacement and learn more about how to properly maintain your CO alarm.

Woman tests her smoke alarm while on a ladder.

How Do I Remove My Smoke Alarm?

Learn more about how to remove your smoke alarm.