The answer to 'panel upgrade burning smell' is that a burning smell coming from your electrical panel is a serious issue that requires immediate attention. This could indicate overheating, loose connections, or other electrical problems that could lead to a fire hazard if not addressed properly.
Some common causes of a burning smell from an electrical panel include overloaded circuits, faulty breakers, loose connections, or aging/damaged components. Symptoms may include flickering lights, circuit breakers tripping frequently, or visible signs of heat or damage on the panel. If you notice a burning smell, it's crucial to shut off power to the panel immediately and call a licensed electrician to diagnose and repair the issue.