LG LDF7774ST dishwasher has no power

[beagle]

Hello again from a long time Grasshopper.

I am again in need of direction.  My LG dishwasher (LDF7774ST) will not function.  Power to unit checks good.  

We opened the front cover to inspect main pc board and check for power at the board connections.  No power to the two power connectors (one black, other blue).  

Noticed darkness on the wire harness connector (blue with 2 wires, blue and brown).  Blue connector appears to be melted and fused to the blue connector base mounted on the pc board.

I read about a possible thermal fuse that could be an issue, but this seems like it could be a bigger problem.  

The pc board shows a part number of EAX61228009-A on the board itself with a sticker on the blue connector showing possible numbers LG1141013 and EBR63265307.

Any and all assistance is greatly appreciated!!

Sincerely, 

Beagle

[ECtoFix]

I did some cross-referencing on-line to determine that the board you need is part number EBR79686304 (which replaces EBR63265307).

From your description, faulty or loose connections caused overheating and subequently damaged the blue connector, the board, the wire terminals...and potentially an inch or more of the wires.  You should replace the board, then cut the wires back until there are clean strands that are free of oxidization. 

Beyond seeing the obviously damaged insulation, you can best determine the wires' condition by working your way back while bending the wire.  The damaged section of wire will probably be stiff (or maybe even crunchy).  Cut that area out so you have pliable wire to work with.  Then, strip back the insulation as you would when preparing to crimp on new terminals.  Before installing your new terminals, visually inspect the wire strands.  They should be clean and shiny.  If they're otherwise DULL or have a white-ish residue coating them, continue cutting the wire back more...and repeat until the strands are good.  Then install new wire terminals. 

I went to the trouble of explaining all of that about the wires because re-using damaged wiring will NOT provide good, clean connections for your new crimp-on terminals.   Poor connections along with the amp draw through them to operate the motor and heating elements will quickly result in damage again... and then you're back to where you're at now.