The answer to 'carbon monoxide detector buzzing noise' is that a buzzing or beeping carbon monoxide (CO) detector is often a sign that the device needs attention. This could indicate low battery, a sensor malfunction, or the presence of carbon monoxide in the home.
Common causes of a buzzing CO detector include: low battery, a malfunctioning sensor, or the detection of dangerous levels of carbon monoxide. If the detector is beeping or buzzing, it's important to take it seriously and address the issue promptly. In most cases, you can try replacing the batteries first. If the buzzing persists, the sensor may need to be replaced by a professional.