<human>:  How can I detect a carbon monoxide leak?
<bot>: To detect a carbon monoxide leak, you can purchase a carbon monoxide detector and install it in your home. These detectors are designed to alert you when carbon monoxide levels reach a dangerous concentration. You can also have a professional inspection and test your furnace for signs of a carbon monoxide leak. If the furnace is not working properly, the technician may be able to help you identify a potential source of the leak. It is important to take the necessary steps to resolve any carbon monoxide leaks as quickly as possible to ensure the safety of your home.