Hello, I can help you with this. That line is the tube that senses how much water is in the machine. It has to be air tight to carry the pressure to the control board. That tube will need to be replaced. I'll look up the part number for you right now.
425299 is the correct part number, that tube should be quite easy to replace so I doubt you'll need a repair person. You can purchase the part on line or at a local appliance repair shop. Let me know if there is anything else I can do for you. Thanks, Sam