The answer to 'why is my switch flickering lights' is that there are several common causes, including loose connections, faulty wiring, or a problem with the switch itself. Flickering lights can be a sign of an electrical issue that needs to be addressed.
Loose connections in the switch or wiring can cause intermittent contact, leading to the flickering. Over time, connections can become loose due to vibration, temperature changes, or corrosion. A faulty switch that is worn out or damaged can also cause the lights to flicker. In some cases, the issue may be with the electrical supply to the switch, such as a problem with the circuit breaker or wiring upstream.