The answer to 'why is my switch burning smell' is that a burning smell from an electrical switch usually indicates an electrical fault or overheating issue. This could be caused by a loose connection, damaged wiring, or a faulty switch itself. The burning smell is a sign of a serious electrical problem that requires immediate attention to prevent potential fire hazards.
If you notice a burning smell coming from an electrical switch, it's important to shut off power to that switch immediately and avoid using it until the issue is resolved. Attempting to continue using a switch with a burning smell could lead to further damage or even a fire. In most cases, the faulty switch will need to be replaced by a licensed electrician to ensure safe and proper operation.