Thanks for your question. Please remember to rate my assistance when we're done. Please talk with me first before rating negatively.It was very common on the Neptune washers for the door switch to fail or the door latch mechanism to go bad and not signal the board the door is closed. First check the Cherry switch. It is the white switch with the round and has a rubber boot over it. You can pop it out after removing the rubber with a small flat screw driver. It was common to go bad or a wire to break on it. You may just need that switch. Check that first as it may be the issue. That is what signals the board the door is closed.
Where do I find the Cherry Switch?