I have a dishwasher that routinely trips the AFCI circuit breaker (A70). I’m wondering if the problem is actually the breaker.
What can I do to debug whether the problem is the dishwasher itself, the wiring, or the breaker? 
Discussion
I’d isolate the dishwasher on the circuit. Make sure nothing else is putting a load on the breaker.
The only other thing plugged in is the garbage disposal, but it’s almost never running. I guess I should unplug it and confirm that the tripping still occurs.
