My parents are having a problem and i wanted to get opinions here before they pay for an electrician. When they built their house in 2000, the entire living room and dining room lights and receptacles plus the outside receptacle was all put on one circuit. It worked fine for a while, but about a month ago, we started experiencing issues. If you turn on the tv, converter box, a lamp, and the space heater, then someone flips on the dining room light, it will throw the breaker every time. this has never been an issue before. Could it be a bad breaker?