My SFC model DVR6-CMNS fireplace pilot is on but the unit will not light. I have replaced the wall switch and still do not get any power to the receptacle inside the unit. I have been told by an electrician that I need to replace the thermocouple. I don't understand why I am not getting power to the receptacle unless it is not wired for some reason. All receptacles on the circuit are energized so it is not a CB problem.