Customer could not reset one of the arc fault breakers that serves the kitchen nook light and receptacles, ceiling light in adjacent garage, dining room light and receptacles, and the freezer receptacle in the pantry. I unplugged all devices from receptacles, then successfully reset the breaker, I then checked each of the three light fixtures to see if they functioned, on and off and on again, all worked, we then plugged in the following device one at a time to see if one of them would trip the arc fault breaker, wireless door chime, floor lamp, xmradio module and radio, power strip for nook tv and finally the freezer in the pantry. None of which caused the arc fault to re-trip.... I explained to the customer that trying to find which device caused the trip can be very elusive, and that he create a list of everything that is on the circuit, the next time he is unable to reset the breaker start by unplugging only one device at a time, then try resetting, and if successful, leave that