This is existing wiring and has not been modified in years. Monday several outlets on the circuit stopped working, while others still worked fine.
It did not trip the breaker. I used a tester. Working outlets showed correct. Failed outlets show hot/ground reversed. Tuesday, I went to troubleshoot the problem and all outlets were working and tested correct. I did the following: Since the wiring strings from outlet to outlet, I went to the last working outlet, (on Monday), and inspected the connections. The wires were pushed in the back of the outlet and not screwed onto the outlet, and the neutral wire going to the next outlets in line was barely in the hole. I attached all wires to the screws. I also checked all other outlets and removed wires from rear holes and also attached them to the screws. I checked a junction box which feeds some outlets and retightened the wire nuts and taped. I used the tester again and all test fine. I used a meter, and tested ground, neutral to hot = 120 V, hot to ground = 120 V, neutral to ground 0 V. I also replaced the breaker.
In your opinion does it appear to have been a loose neutral wire ?
Is there anything else I can / should check ?