The answer to 'switch making buzzing noise' is that a buzzing or humming sound coming from an electrical switch is typically caused by a loose connection or a problem with the switch itself. This can be due to a variety of factors, including age, wear and tear, or improper installation.
Some common causes of a buzzing switch include loose wiring, a faulty switch mechanism, or issues with the electrical current flowing through the switch. If the switch is making a buzzing noise, it's important to address the problem promptly to prevent potential fire hazards or further damage to the electrical system.