The red led light on the motherboard means that there is power to the board. Nothing is wrong with the board.
You say that the clothes are still wet and it is hot at the end of the cycle. I had the same problem with another LG unit and this is what I found. The drain hose in back was too long. What I mean is the drain line looped down to nearly the bottom of the washer and then back up to the drain line. On these washer dryer combos, during the drying cycle, the drain pump will only cycle on for 1 second and then off for 2 minutes. Because of this, the drain pump cannot get the water out of the washer drum properly. You will need to get behind the washer and stuff the drain hose into the drain pipe more to shorten the loop to allow the drain pump to work properly. At least get the bottom of the loop up around half way up the back of the washer.
Be sure to check the drain filter to make sure it's clean.
Hope this helps.