I am a soldier, my MOS is 63J and I need repair the heater Space Heater Convective. The heater has Fault code 3 - Loss of flame. I remplaced flame sensor and Glow Plug but the heater has the same malfuntion. I cleaned the fuel pump lines and put swith in on position and the heater work very good the put it off. When put the heater in on, not work and has the fault code 3 again. I dont movemet in the fuel lines, I think that the fuel pump is damage or Fuel Solenoid Valve, both has voltage when I mesured. Please help me for repair this equipment.