When a Breaker May Need Replacing
A circuit breaker is an automatic switch that cuts power to a circuit when it senses too much current. Most breakers work for years without attention. Replacement may be appropriate when testing shows a breaker no longer trips or resets as it should, when its housing is cracked or scorched, or when it is covered by a manufacturer recall.
Replacement can also come up when a breaker is the wrong type for the panel or the circuit. A breaker that is not listed for use in that panel, or that does not match the circuit, may need to be changed even if it still switches on and off.
Signs that call for a professional assessment include a breaker that will not stay on, a breaker that feels hot, a burning smell near the panel, a handle that feels loose or will not latch, and visible damage around the breaker. If you notice smoke, sparks or heat at the panel, keep everyone away and do not open the cover. If there is fire, leave the building and call 911.