I have a GFCI in my living room bath that controls a couple of lights in the basement and bedroom upstairs (weird, thats what it seems to control).
Now, every 2 or 3 weeks or so, it seems to trip and the light in the basement for won't work (thats what I use regularly so I notice) . It seems to happen mostly when it has rained, but not necessarily with the first rain. It may take a couple of days' rain to cause the trip.
I have been just switching it back on again (must have done it 50 times) and keep going. Will I run into a bigger problem at some point?
I have two lights outside that do not have any covers so rain may be leaking into it through the gaps, but they still work even if GFCI has tripped.
Any ideas to troubleshoot or find the source of the problem?