Hello, I can help you get this issue resolved.
de=door open error
1. door not all the way closed.
2. loose electrical connections at door switch and to the computer board.
3. the door switch assembly is out of order.
If it is the door switch you can order one to replace it, the part number you will need to order is : Part#6601ER1004C .
you can order the switch online at sears, repair clinic, amazon or ebay very easily. Here is a link to sears for the part
here is a youtube video of how to replace the lock step by step
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