Re: Logik L612WM13
E21 = pump out problem. If still shows this fault but does actually pump out water it is possible that pressure switch is at fault, it is quite common that they can fail either to cause over filling or the opposite = no filling at all or stuck on pump out because it thinks it has overfilled or blockage in air trap-follow the black hose from the pressure switch down to the air trap. There`s a rough / bad translation from Chinese on Partmaster just find your model and then find service manual. Tap side of pressure switch a few times with a screw driver handle, if that does cure it still change the pressure switch.