The answer to 'GFCI outlet making buzzing noise' is that a buzzing or humming sound coming from a GFCI (ground fault circuit interrupter) outlet is often caused by a problem with the outlet itself or the wiring connected to it. This can indicate an issue that requires professional attention.
Common causes of a buzzing GFCI outlet include a loose connection, a faulty GFCI mechanism, or interference from nearby electrical devices. In some cases, the buzzing may be normal and not indicate a problem, but it's best to have it inspected by a licensed electrician to determine the root cause and ensure the outlet is functioning properly and safely.