The answer to 'why is my circuit breaker burning smell' is that a burning smell from a circuit breaker is a sign of an electrical problem that requires immediate attention. This could be caused by an overloaded circuit, a short circuit, or a faulty circuit breaker. The burning smell indicates that the circuit breaker is overheating, which can lead to a fire hazard if not addressed quickly.
You should immediately turn off the circuit breaker and unplug any devices or appliances connected to that circuit. Do not attempt to reset the circuit breaker, as this could cause further damage. Instead, you should call a licensed electrician to inspect the circuit and determine the root cause of the issue. They can safely diagnose and repair the problem to prevent any further damage or safety hazards.