Sounds like the problem is a bad main control board on the back of the refrigerator (#18 at the diagram
). This part is not too difficult to replace if you know how to handle a simple tools. Do not forget to unplug the refrigerator.
- The main control board Part number: W10135090
Here are the breakdown diagrams and Replacement parts for Whirlpool GD5RHAXNT00 REFRIGERATOR | AppliancePartsPros.com