What happens when a breaker goes bad and how can it be identified and fixed?

When a breaker goes bad, it may fail to trip properly or trip frequently. This can lead to electrical issues like overheating or fires. To identify a bad breaker, look for signs like burning smells, tripping without cause, or physical damage. To fix it, turn off the power, replace the breaker with a new one of the same type, and test the circuit to ensure it is working properly. If unsure, consult a professional electrician for help.