My bedroom breaker keeps tripping even when nothing is plugged in to any of the outlet linked to this breaker. Sometimes it will keep tripping when I try to push it back up and after 10-20 min' turn back on just fine. Sometimes it won't trip for couple of days and sometimes it will trip again after 10 min'. On a regular basis here is nothing too heavy connected, just 2 power strips with phone charger and lamp, TV, and window A/C.
There are 5 outlets and one light switch on this breaker. I have replaced all the outlets to GFCI and it worked fine for few days. My thinking was, If I put the GFCI, the bad outlet will trip before the breaker. But now when it trips, when pressing on the GFCI outlet 'Reset' button, it seem like non of the outlets tripped.
What I did notice is that the wiring is 12/2 romex and the breaker is 15A. Could I be dealing with a bad breaker?! If the wiring is 12/2 should I replace the breaker to 20A?