The answer to 'GFCI outlet making buzzing noise' is that a buzzing sound from a GFCI (ground fault circuit interrupter) outlet is often caused by a problem with the outlet itself or the electrical wiring connected to it. This can indicate an issue that requires attention to prevent potential safety hazards or damage to your home's electrical system.
Some common causes of a buzzing GFCI outlet include a faulty GFCI, loose wiring connections, or a ground fault in the circuit. The buzzing sound may also be accompanied by the GFCI tripping or the outlet not working properly. In some cases, the buzzing may be due to electrical interference or a problem with the circuit breaker feeding the GFCI outlet.