Whomever built this house was adequate at a lot of things and master of none. I'm not an electrician but there are a lot of things about the way the place was wired that don't seem quite right to me.
The problem that's bugging me the most is that there is a GFCI outlet on the kitchen counter that's not only feeding another outlet, it's feeding a light fixture above the sink.
This light above the sink has been tripping the GFCI on and off for about a year now (sometimes it trips, sometimes it doesn't, I can't repeat it or determine a cause.)
Today the people buying our house (we're moving) did a final walk through, and of course although that light worked during the inspection, and we had it on all day yesterday, today it trips the GFCI.
I took the light fixture down and all connections seem to be good, I took the fed outlet out and that's good, and all the connections in the GFCI are correct too. I replaced the GFCI with a new outlet, still no luck.
I plugged a lamp with the same wattage as the light fixture into the fed outlet, and it does NOT trip the GFCI, so it has to but something about the light fixture itself. Is there anything I can do to fix this? I know, I should have had it fixed earlier, but it was behaving and I didn't even think of it with the million other things going on.