I ran my electric space heater this morning and the power went out on that circuit. I checked the breakers and none had tripped. I reset all the breakers, but still no power on that circuit. I have three GFI's, but none of them are tripped, and they are on a different circuit anyway.

I've unplugged everything and still no power, but no tripped breakers.

Could a breaker be bad, even though it resets like all the other breakers and feels locked into the "on" position?

What else could cause no power in that circuit?