20 Most Recent LG WM-3677HW Front Load Washer / Dryer Questions & Answers

CD means cool down, press the pause start button, the door lock will open. It is an anti crease cycle. It mentions it in the owners manual, but it is hidden deep in the drying section.
Sgt 48

boards can be repaired,find any computer geek

check belt and motor windings

www.lg.com/us/support

When you press start button the signal is sent to the main board. The leak is from a bad bellow that rubber on you door, if your door is not damage. it's not sealing with the door.

becouse the water in drum machine not spining,,chek the drain motor,properly,,

water discharge drain $50 part, easy installation. google the lg model to locate part.

Ok try this .
You say you know your way around electric. Here is the service manual incl drawings.
LINK

It is possible that the machine does not start off the cycle because there are errors due to feedback from the inputs. For the program to start up the main program controller must initiate the INLET/MOTOR/DRAIN pump/ valve to open up and allow each function to be driven starting from the flow of water into the drum as also the drain valve to open to exit the water at the point of the program cycle. If this does not happen then the voltage at the valve/motor/pump must be checked or the fault relates to no voltage from the controller. This means the controller is a suspect.

Check the heating element for continuity. Here is the part if you find it bad.