Hi,

Turn the circuit breaker off or pull the power plug.Remove the 2 screws on the lower panel in front.Lift up the white plastic cover and you will see a little black disc with a red button in the middle--press this in.That was the high limit for the heater for the wash cycle.To the right you will see another one and on the right of the booster between the side of the cover is another one,press these also,they are for your booster heater.Power up the unit and well go from there,let it sit 20 min to get hot.

Let me know,once done.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

This may be the a problem with the timer. It may be jumping to the wrong setting.

If the fill light flashes, that means the booster is pre-heating. This can take up to 8 minutes.
The OE message is a Fill/Drain error and will remain until you press the off button.
The OE will display if the machine's temperature isn't correct, or if the machine is not level, low water pressure, dirty water sensors inside machine, drain valve is opening or drain solenoid is leaking

Http://www.acmehowto.com/howto/appliance/dishwasher/dishwasher.php
http://www.appliancerepair.net/apnet/frameset?http://www.appliancerepair.net/apnet/dish/index.htm
http://www.repairclinic.com/Dishwasher-Repair-Help
www.askanowner.com/_upload/1_2/attachments/LX30H_1.pdf Manual Above. Below is a Service manual, this is what the engineers use to troubleshoot & repair these items, just follow the troubleshooting procedures and you will soon have a working unit.
http://www.alliedboilers.com/pdf/electric_booster_installation_manual.pdf
Select each link, and right click, choose ope, in mew Tab/Window.
It may NOT be your problem below, but it is simply amazing just how many, times this will "Fix" the "Problem"
Ok so your dishwasher won't do anything... it justs sits there and "Hums" you can't make it respond to any controls, and the ONLY way to Stop it. is to unplug the unit, replugging back in it simply "Hums" again and will do nothing.
Now this happens because, the STOP Button, is pressed and the "Door Opened", during the Wash Cycle. This should NOT be done. You shouldNEVER TURN IT OFF MID-CYCLE. you should instead, Simply, pull on the handle, to Open the door, the system will take care of everything, after, you close it,and pick up where it left off. The turning OFF, makes the machine "Think" that a New Cycle, is going to be done, before the old one is finished, and resets itself to do it all again. But it still has water, that's not meant to be there so it must dump it out.
Now, the FIX. Take the Dishwasher, out, and tip over on it's side, tip to about a 45' angle. Water will come out from underneath, this is from a small "Overflow" reservoir. this reservoir has an "Anti-Flood" switch. The removing of this water will "Reset" this Switch, and allow the dishwasher to work again.
So what happens, is this, when the STOP button is pressed Mid-Cycle, the machine must "Dump" whatever water is still in the machine, into the "Overflow Reservoir". This water then causes the Anti-flood switch to jam, and this stops the machine, until it is reset,by the above method.

Hi.

E0 means that there is a filling related problem because the water temperature does not reach the desired temperature.

When you press wash the machine will drain because water temperature is not reached.

Check water inlet, and disconnect power for five minutes to reset the machine.

If that does not help, then the most common fault is a malfunctioning thermostat. In that case contact hobart, locating the nearest service office. See:Contact Us | Hobart

Here the manual. Errors are detailed at page 14 and on last section of troubleshooting.