I am completely new to this. I am working on a mizuho challenge time world of flights type-b machine. Getting a reoccurring CR code. I am able to reset machine and clear code but as soon as I go to close the door, code comes back. If I don't close door machine works fine. I assumed a wiring harness but I can't reproduce the problem by jiggling any wires. Only when I move door. Any suggestions??