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
Gene.