[GWN7]

Do you have copper or aluminum wire in your house? Aluminum wire can work it 'self loose and kill a circuit. This happened at my DIL's brothers house. They lost a bedroom ceiling light, bathroom ceiling light and 4 wall plugs. I traced it to a loose wire in the bedroom ceiling light switch and once tightened everything came back on. Good thing the part of the house that had no power had a unfinished basement so chasing the wire runs wasn't that hard. I used a circuit power tester that looks like a pen. Chirps if there is power in shielded wire. Works well in the NMD type wire (plastic coated) but not so well in the paper/asphalt coated wires. I just used it to replace a stretch of wire from the fuse panel to a outdoor plug. No oblivious breaks or damage to the wire (copper 14/2) but in a 10' length it quit working for some reason. Easier to pull a new wire than splice it.