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either the door switches have failed or the main control which reads these door switches have. the switches are easy to test and replace. all you need is to do continuity tests while unpugged. easier to test them if you remove the whole switch assembly and kind of pull it out a bit.
before you take any of them out those make sure the latches on the door are not broken or loose there is a spring inside typically that pulls the hooks down be sure its functioning.