Ajay M Greer , SC August 25, 2020 Appliance: Whirlpool Refrigerator GS6NVEXVS01 Whirlpool Refrigerator Gs6nvexvs01: Freezer was cooling but refrigerator was not cooling enough,. How to replace Air Diffuser Assembly. Replaced two parts - Defrost Thermostat and Air Diffuser Assembly. Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours