We were called out today to look at smoke detectors that were failing. When we arrived the customer had already taken down all the smoke detectors. We went to the panel in the basement and saw that the arc-fault breaker controlling the smoke detectors had tripped. When resetting the breaker, we noticed that the handle was stiff and, when testing the arc-fault, it tripped hard. We recommended replacing the breaker. We also provided a solution for a whole home surge protector.