The answer to 'switch burning smell' is that a burning smell coming from an electrical switch is a sign of a serious problem that requires immediate attention. This could be caused by an overloaded circuit, a faulty switch, or a wiring issue that is creating excessive heat and potentially posing a fire hazard.
Some common symptoms of a switch with a burning smell include the switch feeling hot to the touch, sparks or flickering lights, and the smell of something burning. If you notice any of these signs, you should shut off power to the switch immediately and avoid using it until it can be properly inspected and repaired by a licensed electrician. Attempting to troubleshoot or repair a switch with a burning smell yourself can be extremely dangerous and should be avoided.