Ceiling-fan-buzzing-when-running, check the electrical switch your ceiling fan is connected to. sometimes the electrical switch produces a humming sound when the fan is running. replace a faulty electric switch or connect the ceiling fan so you can operate it by using the pull-chains.. Visit the post for more. tips to fix a ceiling fan making noise ventilador de teto tron buzzing ceiling fan that hums or turns slowly ceiling fan making loud buzzing droning