I only need the blue part included in item no. AP4027033. thanks
Answer Hello Kristy. The only way to get that part is with the assembly 22003462.
should I replace the whole water despenser to stop the overflow leaking
Answer Clint, The dispenser has little to nothing to do with a overflow or leaking situation. You may have an issue with the wax motor or diverter valve, in which case you will need a new dispenser assembly. Good Luck and Thanks