Today I showed up for an evaluation on a heat pump unit where the compressor would not come on and the fan would come on momentarily and shut back off after opening up the unit and taking a look I realized there is only one leg of power making it to the unit went to the main breaker panel and did not find any issues the breaker was not tripped both legs coming out of the breaker were producing 120 volts accumulatively 240 volt so I connected a toner to the wires on the outside and traced the wire all the way through the Attic verifying that there was no junction box or visible brake in the line then I disconnected the wires at the outdoor unit as well as inside the main breaker panel I wire nutted the wires together inside the breaker panel and went outside with my electric meter to test for continuity I was unable to achieve continuity verifying that there is a break in the black leg of power running through that Romex at this point it is something that an electrician needs to come ou