I have a LG LDF7810 dishwasher that has all lights blinking and the pump running upon startup and it won't turn off.

SOURCE: Washing Machine starts, squirts water, then stops.

E5E  IS FOR  Communication problem. THERE IS 100 %WIRE SHORTING SOMEWHERE.PLEASE CHECK OUT.
ALSO OTHER ERRORS Error code - Fault condition
E11 Fill time too long.
E13 Water leak in tub or air leak in air bell.
E14 Reed switch.
E21 Water not pumping out fast enough.
E23 Drain pump relay on control board failed.
E24 Drain pump relay on control board failed.
E31 Better models. Pressure sensor not communicating with control board.
E35 Better models. Pressure sensor indicates water overfill.
E41 Control board thinks the door switch is open.
E42 Door remains locked after cycle is completed.
E43 Control board problem. 
E44 Control board problem. 
E45 Control board problem. 
E46 Control board problem.
E47 Board thinks the door PTC circuit is open in spin.
E48 Board thinks the door PTC circuit is closed.
E52 Bad signal from tacho generator.
E55 Motor overheating.
E56 High motor current.
E57 High current on inverter.
E58 High current on motor phase.
E59 No tacho signal for 3 seconds.
E5A High temperature on heat sink.
E5B High temperature on heat sink.
E5C High temperature on heat sink.
E5D Communication problem.
E5E Communication problem.
E5F Communication problem.
E67 Input voltage on microprocessor incorrect.
E75 Better models only. Water temperature sensor circuit.
E76 Better model only. NTC temperature for the cold water valve over the limits.
E95 Communication error.
EB1 Incoming power frequency out of limits.
EB2 Incoming line voltage above 130 VAC.
EB3 Incoming line voltage below 90 VAC.
EF1 Clogged drain pump.
EF2 To much soap.

SOURCE: LG Dishwasher LDF7810 SST : tE Error (thermal error?)

Recommend that you closely check the water temp of incoming water. There is an error in some service manuals and if the inlet water temp is greater than 149 degrees (F) (some manuals incorrectly say 194 degrees), you could get an imediate tE error.
If that does not solve the problem:
_recheck_ the electric resistance of Thermistor. (11~14k Ohms at 77 degrees (F) )
Good Luck!

SOURCE: ERROR CODE "TE"

I had the tE error code on my dishwasher LDF7811ST and noticed that with the door half open the error would not appear. I faked the door being closed (pushed in the top latch (can be unlocked by pulling out with a paperclip after the test) after which the washer worked fine: suspected the wiring harness. Removed the stainless steel front and discovered quickly that 1 wire was cut (might have made contact with the door half open), 2 wires to the point where the insulation was gone and the bare conductor exposed (!)and 2 more were about to to be cut completely! I soldered and shrink wrapped the wires and the problem was gone. Made some pictures for evidence and plan to contact LG as this is a fire hazard!

Alexander

SOURCE: lg 801 3f washing machine. 15 seconds after selecting any cycle a

I had the same problem. Redistributing the clothes inside the machine seems to do the trick. Even though the clothes seemed evenly distributed and I had far less than maximum capacity in the machine- it seemed to think that something was out of sync- simply moving the clothes around did the trick!

SOURCE: Replaced the thermistor on the lg washing machine

sometimes these
have lockouts,
try reseting the eprom
there is two ways,,,
unplug it for ten minutes
or push and hold the pause button for 10 secs
depending on your model this should work
but not knowing the exact model i cant be more help ful but i do hope this saves you 200