Am currently noticing that a kitchen lighting circuit will 'blink' every once in a while and wondering if it is necessary/prudent to occasionally just change out with a new breaker [as far as I know the circuit is not overloaded]? Do they wear out? Have been in the house about a dozen years and only swapped out 1 because I could hear it clicking/chattering when the circuit was in use [arcing?].

I bought a house back in June, inspection checked out ok for the limited amount that they check, and to the best of my ability and from what I can tell, the house has 12-2 with ground Romex Wiring and a Square-D 100 AMP Service Panel. I don't know how long it had been doing this, or if it was doing it before we bought the house, but I had began to notice the lights flickering, it wasn't when anything was running, and it would intermittently do it, it would just do it for the sake of doing it. My brother in law's brother is an electrician and he has helped me trouble shoot some of it. I went through majority of the house and have installed Tamper Proof outlets, and new light switches, I never noticed a loose neutral anywhere, and made sure I had good connection when I installed the new outlets. I have a tester that also tells me with their is an open Neutral and I haven't noticed that at any of the outlets (is there anyway I could check the swtiches/lights?) I got curious one day and went to the panel when the lights started flickering and started flipping breakers, I ended up finding which breaker made the lights stop flickering. It is one on the kitchen. It is 4 outlets, the dishwasher, garbage disposal (seldom used, and never used when the dishwaser is running) and the Keurig (which is usually only used on its own as well.) However, here is where it get's interesting. Back in the summer we had a pole barn built, we ran a 60 amp disconnect under ground out to the pole barn OFF of the meter, and the lights flicker out there as well! Didn't figure this out until after I had done some of the experimenting inside. I called the POCO and they came out and whatever they did worked for about a week, then started doing it again, I've since called them and they are coming back out and looking at it again. I was never informed what happened until I called them about it doing it again, she said they made note that there was a loose neutral at the transformer. So they are coming back out again to take a look at it. If this continues to happen, or if the POCO says their side is good, what are my options? I find it odd that it is doing it at both buildings, house and garage, it feels like it would HAVE to be on the POCO's side. Thanks, and I appologize in advance for the lengthy read.