4 Reasons Your Circuit Breaker Panel is Buzzing - Energy Today 4 Reasons Your Circuit Breaker Panel is Buzzing. July 01, 2016. So if you hear your electrical panel buzzing and you immediately panic, we don’t blame you. A buzzing or sizzling noise and possibly an occasional spark. Most likely problem: A loose or damaged wire. Why Does My Circuit Breaker Panel Make a Buzzing/Humming Why Does My Circuit Breaker Panel Make a Buzzing/Humming Noise When My AC Comes On? 2014 Jul 02. To help keep your AC healthy and your family safe, we’ll cover the main reasons your electric panel is making this buzzing/humming noise when your air conditioner is running.