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The codes are "E" Codes. an E13 is no fuel. E-14 means flame rod malfunction. Unplug the heater then reconnect, this will reset the heater. Try your red prime button. Could also be the fuel pump or your fuel source feed line isn't flowing fuel.
E13 means the heater failed to ignite. This could be because of the igniter, the circuit board, a fuel or fuel pump problem, the flame rod being dirty or grounded, The air pressure switch or an overheat occurred. First check the igniter. You can measure the resistance of the igniter with an ohmmeter, it should be somewhere around 16.8 ohms. If you hear a loud ticking or thumping sound before you get the code then you have a fuel flow problem. This can be because of the filter at your barrel or the strainer in the fuel sump or an air bubble in the fuel line. A dirty flame rod can be cleaned with some steelwool or fine grit sandpaper. Unplug the heater before cleaning the flame rod. If the fuel pump ran before you got the error code then the air pressure switch is ok because the fuel pump will not run if the airpressure switch contacts are not closed.
causes of E13 error code: Failure of ignitor, solenoid pump or circuit board. Incorrect wiring or flame rod touches to burner parts. Air pressure switch or overheat open
I recommend taking it to a qualified service center.
Unfortunately, this can be a hard problem to trace with some experience and equipment.
Next time you try to start the unit listen to the pump on the lower right side of the unit. Just before the E13 message if you hear a thumping noise, you have a fuel problem. If you don't hear a thumping and there is a flame you have a problem with the inside of the burner. I would say since it's a 2400 you have a fuel problem. Low fuel, no fuel, dirty filter or blocked flue pipe.
You have an obstruction in your fuel line. Lint or rust or some other debris, either in your main fuel filter which I hope you have or in the small one in the fuel sump on the lower right hand side (the little square hole below the round finger hole for the reset button). The screen is cleanable with air or brakekleen or both. Or it might be that your Constant Level Valve is tripping or has tripped. Push the button in the round hole on the lower right hand one time quickly (don't hold it down or press it several times slowly) and you should hear the float drop. Fuel should resume flowing to the fuel sump at that time.
I cleaned the fuel screen located on the unit and replaced the filter on the external fuel tank. The external filter can freeze if it accumulates enough water and the temp is cold enough, or it can just get full of debris. I also unplugged the 2400 for 30 min to let the factory preset settings come back. Filter(s) caused the e14 error, preset settings cured the e13 error caused by me fooling with the start stop function so much. Thanks for the help!
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