In ideal conditions, circuit breakers should last for several decades. However, electrical overloads and building conditions can shorten a breaker’s lifespan. Breakers should be replaced if there are signs of physical damage, such as burn marks, damaged insulation, or melted wires. Breakers that trip repeatedly or won’t stay reset in the absence of overloads or short circuits may be nearing the end of their lifespan. Annual inspections can help to detect problems before they cause safety concerns.