Replacing a circuit breaker is a fairly complex electrical repair. Usually, this type of work should be performed by an experienced professional who can accurately diagnose the problem and is familiar with wiring techniques and safety protocols. This project involves disabling all branch and main circuits and checking for currents before removing the faulty breaker. You also need to find an identical replacement circuit breaker. In most cases, breakers only need to be replaced if the contacts are worn or if they have been damaged due to arcing or electrical overloads. There’s also a chance that the problem could be caused by a short circuit, faulty bus bar, or defect in another part of the electrical system. A professional electrician can determine this for you.