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What Should You Do If Your CO Alarm Triggers?

April 5, 2026

Quick Answer

If your CO alarm triggers, evacuate the area immediately and call 911 or your local emergency number. Do not delay or try to investigate the source of the carbon monoxide. Get fresh air and stay alert for any further alerts.

Evacuate Immediately

When a CO alarm triggers, you should not try to investigate the source of the carbon monoxide. Your priority is to get everyone out of the area as quickly and safely as possible. Open windows and doors to provide ventilation, but do not rely on this to clear the air. CO can be a silent killer, and every minute counts. Leave the area and call 911 or your local emergency number from a safe location.

Check for CO Sources

Once you have evacuated the area and ensured your safety, identify the possible source of the carbon monoxide. If you have a generator, check to see if it has been properly maintained and is still running. Generators can produce high levels of CO if they are not used correctly. Other potential sources include fuel-burning appliances, fireplaces, and attached garages. Make a note of any potential hazards and take steps to address them.

Prevent Future CO Incidents

To prevent future CO incidents, take steps to ensure proper ventilation and maintenance of fuel-burning appliances and generators. Always follow the manufacturer’s instructions for use and maintenance. Keep fuel-burning appliances and generators at least 20 feet away from living spaces and windows. Consider installing a carbon monoxide detector with a digital display that can provide more accurate readings and alerts. Regularly test your CO detectors and replace batteries as needed.

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