I have 2x 15amp AFCI Siemens breakers, both are tripping. One breaker would trip instantly and the other one after a few minutes. Nothing new was plugged in into these circuits. It just happened out of the blue and was working fine for years. The house was built around 2003.
The breaker that instantly trips connects to the master bathroom which has a light, 2 receptacles (non gfci), and bathroom fan. It also connects to the laundry room but only to the light and fan. Lastly, it also connects to 2 lights in the upstairs hallway.
The breaker that would trip after a few minutes is connected to 3 bedrooms, 2 rooms has 2 receptacles and the master has 3 receptacles.
Would replacing the breaker be my first (quickest) option at this point? would swapping breakers to see if the instant tripping follows the breaker or the circuits be a good troubleshooting idea?