Buzzing Noises
When your electrical switches and outlets are working properly, they should not make any audible noises. If you hear buzzing or crackling noises when plugging in an appliance or turning on a switch, it could be due to an overloaded, loose, or improperly grounded wire. If the noise is coming from a specific appliance, unplug it immediately and do not plug anything else into the outlet until an electrician has confirmed it is safe to do so.
Hearing a buzzing sound from an electrical panel is especially concerning and necessitates the immediate attention of a professional, especially if the noise can be heard from more than a few feet away. This could indicate a major issue with one of your circuit breakers (a safety switch that will stop the flow of electricity in an emergency). You should check your policy to see if you're covered in this situation and if you have a home warranty plan.