A slight breaker box humming noise from your electrical panel is highly normal and should not be of concern to you. To explain, what you're mainly hearing is the flow of electrical current within the circuitry of your home. Faint Circuit Breaker Buzzing 2. When they start tripping, overheating, or making strange noises, it's more than just an inconvenience - it's your home's cry for help. Some are harmless at first, while others could be warning signs of a deeper problem. Knowing the cause helps you understand what kind of repair might be needed. Resolution: Operational noise has been a question for a long time and it is generally a stacking up of factors which by themselves go unnoticed, but which together are noticed.