Frigidarie Water leaking in ICW make while dispensing water from water dispenser

Hello, My Frigidaire refigrator model # FRS26HFAB4 drips water inside the freezer whenever the water dispenser is used, even though the ice-maker is turned off.
I think there is something wrong with the valve where it routes the water to water-dispenser and the ice-maker chamber.
For some reason, when water dispenser is operated, the valve also open’s the water flow to ice-maker chamber.
I would appreciate some help on this issue:

  1. How to determine the faulty part
  2. Steps to replace it.
    Thanks!