Electric Panel---20A Circuit Breaker---GFCI (Kitchen)----Load1---Load2---Load3---Load4
The first floor wall on which GFCI and Load1,2,3,4 installed was affected by laundry water very minor leakage about a year back. Resetting the GFCI solved that problem twice. 2 months back the GFCI tripped and was not getting reset right away. It would take a day or 3 days to get the GFCI reset again. That time only load connected is a small table top microwave in Load1 socket. Load2-4 were empty and will be used for Juicer, rice cooker etc when needed. But all were disconnected.
Assuming the Microwave load may be tripping it, i removed the microwave. So no load device connected now. The recent GFCI tripped never restored.
So far, I have removed and checked Load1,2,3,4 connections. No signs of burning or loose. I have replaced GFCI twice. I have also replaced the 20A Circuit Breaker in the Panel.
Problem is still no power to GFCI or load now.
I further removed GFCI's Load side wires (neutral and Hot). The ground of incoming to GFCI and outgoing to Load is connected by a crimp, so I could not separate that. Tested 115 voltage between incoming Hot and neutral wires on the screw. But no led light on GFCI or no lower in GFCI socket when a lamp plugged in. GFCI tester shows no lights.
The GFCI tester shows no lights at all. (It used to show fault or all good earlier).
I am electrical engineer (many many years back, but worked in IT, Instrumentations and SCADA and I am quiet technical as well handy). It is frustrating not able to debug this.
Any tips before I throw my hat and call somebody? What should I test? (I have many types of testers) Connecting back the microwave will show different symptoms? One of the Load if having a loose neutral, will that show no power on GFCI outlet itself?