The answer to 'circuit breaker burning smell' is that a burning smell from a circuit breaker is a serious issue that requires immediate attention. This indicates an electrical problem that could lead to a fire hazard if not addressed promptly. Some common causes include an overloaded circuit, a short circuit, or a faulty breaker.
If you notice a burning smell coming from a circuit breaker, you should first turn off the breaker and unplug any devices connected to that circuit. Do not attempt to reset the breaker, as this could make the problem worse. Instead, you should call a licensed electrician to diagnose and repair the issue. Trying to fix the problem yourself could be dangerous and may even lead to further damage or injury.