Mikey
Aspiring Old Fart, EE, computer & networking geek
Are those non-tripping AFCIs on the same leg as the tripping ones? If so, we can probably rule out line-side problems. If not, try moving one of them to the suspect leg and see if it will join its cousins and trip weekly.By the way, I wasn't aware of this at first but the main panel for the original part of the house has AFCIs for the bedrooms as well and those are not tripping.
Another test- when you reset them, reset them at different times and see if the problem associates with one particular breaker. You could probably do that tonight. Turn one off and reset it at, say, 6:30, and the other at 7:00. Then a week from tonight grab your popcorn and gather 'round at 6:25 or so and see what happens. They should still both trip at the same time, but at either 6:30 or 7:00, which would point the finger at one particular branch circuit. To confirm that, swap the hot wires on the two breakers and again reset them 30 minutes apart. Come back the following week and see if the problem does, in fact, occur on the same circuit.
You might be able to rule out the outdoot GFCI by tripping it manually and leaving it off.
Of course, in any experiment you should always change only one independent variable at a time, so with each test taking a week, this is going to be a career, not a job. I hope I live long enough to hear what the problem was...
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