Carbon monoxide alarms are designed to detect the presence of carbon monoxide gas in the air. Here are some things that can cause a carbon monoxide alarm to go off:

• Fuel-burning appliances: If a fuel-burning appliance, such as a furnace, water heater, or stove, is not functioning properly, it can produce carbon monoxide gas. This gas can then build up in your home and trigger the alarm.

• Blocked vents: If the vents in your home become blocked, carbon monoxide gas can build up and trigger the alarm. This can happen if there is a blockage in the chimney or if the vents become clogged with debris.

• Excessive moisture: Carbon monoxide alarms can be triggered by excessive moisture, such as steam from a shower or bath. For this reason, it is recommended that carbon monoxide alarms not be installed in areas with excessive steam.

• Expired or malfunctioning detectors: Carbon monoxide alarms have a limited lifespan and can become less effective over time. If your alarm is expired or malfunctioning, it may produce false alarms.

If your carbon monoxide alarm goes off, it is important to take it seriously and take immediate action. Leave the building with any family members and pets and seek fresh air immediately. Dial 911 right away to let emergency responders know your CO alarm has been activated. Do not re-enter the home, even after the alarm stops going off.