The answer to 'why is my circuit breaker not working' is that a circuit breaker may not be working due to a few common reasons, such as a tripped or faulty breaker, an overloaded circuit, or a short circuit. A tripped breaker is the most common cause, which happens when the circuit has drawn more power than it can handle, causing the breaker to trip and cut off the electricity to protect the circuit.
Other potential causes include a faulty breaker that needs replacement, or a short circuit in the wiring that is causing the breaker to trip. An overloaded circuit, where too many high-powered devices are connected, can also cause the breaker to trip frequently.