I have a customer that claims that his arc fault breaker trips when he is using his electric range in his kitchen. I have been to the house to troubleshoot this twice all ready. Whenever I go he cannot seem to make the arc-fault trip no matter what he does to the range. I cannot get it to trip either unless I push the test button. The first time I was there I changed out the arc-fault to a new one and it seemed to solve the problem for a month or so. He called back with the same story of the range making it trip. I went back and of course he could not get it to do it. I humored him and change out his range receptacle and made sure all connections were tight and was on my way. Three weeks later guess who's calling. What should I do at this point? Is it impossible for other circuits to effect the arc fault circuit breaker? The only thing on the arc fault breaker are some exterior lights with CFL bulbs and bedroom receptacles. Might be a bathroom exhaust fan too.