I have 4 dead circuits which were intermittent off/on at first- now dead. The 20 amp dual tandem breakers are across from each other in the breaker box. The breakers/circuits above and below the affected breakers are live and functioning properly.
There was enough voltage earlier to energize the digital temperature readout on an LG window unit, but turning on a light killed the display.There was also a faint odor of something burning, resembling burnt newspaper. Box and breakers are cutler/hammer.
I'm about to pull the guilty breakers and replace them and check the BUS.
Best Answer
If all the breakers on every other row go out, you lost one of your phases. That's not as bad as losing a neutral, in which case each 120V leg can go as high as 240V, blowing stuff up and starting fires. All that to say, if it proves to be a wire connection problem, check your neutral too!
If both breakers in a single row go out, you may have a burned up bus bar there.
For two rows, and not others, to go out, very unusual. Maybe if they're the bottom two on the panel and somehow the bus bar burned up or took damage, but they usually don't make bus bars thinner near the bottom, so there's no reason for that to happen.