The answer to 'why is my electrical panel buzzing noise' is that a buzzing electrical panel is often caused by a loose connection or a problem with the main circuit breaker. This can happen over time as the panel ages and components wear down. The buzzing sound is typically caused by electrical arcing or vibration within the panel.
Some common causes of a buzzing electrical panel include loose connections, a failing circuit breaker, overloaded circuits, or even water damage. It's important to address the issue promptly, as a buzzing panel can be a fire hazard. If you're not comfortable troubleshooting the issue yourself, it's best to call a licensed electrician to inspect the panel and make any necessary repairs.