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Most likely you have a blown thermal fuse, when the thermal fuse blows the machine shuts down completely and you will have no power to it, Dishwasher thermal fuse assembly. This fuse protects your dishwasher from overheating. If the dishwasher overheats this device will fail to prevent further damage to your appliance. If it does fail you should repair the overheating problem first and then replace this thermal fuse. It's part number six on this diagram and is up in the control panel,