Today i noticed my furnace wasnt firing up. Checked all switches and the breaker switch and all were on. Started checking wires and came to find that the wire powering it was not live. Opened the breaker box and the circuit switch and wire connected to it were good. I traced the wire up and just outside the breaker box, the wire had no power in it. How could it be possible that the wire has no power just outside the box but has power at the circuit switch? Have not been able to figure this out.