The answer to 'how to test carbon monoxide detector' is to regularly test your carbon monoxide (CO) detector to ensure it is working properly. Carbon monoxide is an odorless, colorless gas that can be deadly, so it's important to make sure your detector is functioning correctly.
To test your CO detector, simply press the 'test' button on the unit. This will trigger the alarm and confirm that the detector is powered on and able to sense carbon monoxide. You should hear the alarm sound and the lights on the detector should flash. If the alarm does not go off, replace the batteries or the entire unit if it's not working properly.