While using hairdryer power went out. Nothing was tripped in the breaker panel. The gfci switch would not reset. Bought new gfci switch and replaced it for old one. Still no power in master bathroom, hall bath outlet does not work either as well as a few other outlets in different rooms. Is this possibly a burnt wire? Electrician came in and tested breaker box and all light switches and outlets in the home. All was fine except the original issue which still read at 0. He was unable to diagnose the problem. He suggest running new wire from gfci outlet to the panel..... is this safe if it is a faulty or burnt wire? Since the wire was not found.. just worried is all I don’t need a bigger problem on top of what I already have. Any advice???
I would expect this to be a wiring problem, but there is a 99% chance the problem is at one of the ends of wires, i.e. Where they connect to a device like an outlet, switch or splice.
Code requires that all junction points be accessible in junction boxes. Almost all junction boxes are behind switches, outlets, lamps, or other points of use.
So I would shut off the breaker and note what things have lost power. It is likely a wire connection problem at one of them.
It almost has to be at the last one which is working or the first one that failed, but that depends on the idea of them being in a "string" one to the next to the next, and it is often difficult to guess where those are.
The #1 type of wire connection problem is called a "backstab". We have a lot of Q&A about those.