Fuse switch won’t stay on? A circuit breaker is an automatically operated electrical switch designed to act as a big ON-OFF switch. Once a fault/overload is detected your circuit breaker will “trip” halting the flow of electricity. Unlike a fuse which needs replacement, once it blows a circuit breaker simply gets reset to “ON” position, which means flipping the lever from the tripped position, to the fully “OFF” position, then flipping it back “ON”. Contact The Plumbing & Electrical Doctor we’ll send one of our Electricians to have it checked.