The answer to 'why is my carbon monoxide detector outlet not working' is that there could be several common causes, including a faulty outlet, a tripped circuit breaker, or an issue with the detector itself. Carbon monoxide detectors are an important safety device, so it's important to troubleshoot and resolve any problems quickly.
First, check the outlet that the detector is plugged into to ensure it's functioning properly. Use a voltage tester to check for power at the outlet. If there's no power, the outlet may need to be replaced. You can also try plugging another device into the outlet to see if it's working.