Hoa T Westminster , CA January 09, 2023 Appliance: Whirlpool Refrigerator GD5DHAXVB02 Whirlpool Refrigerator Gd5dhaxvb02: Knock knock--- fresh food side. How to replace Diffuser (Refrigerator Air Damper). So easy to replace the Diffuser, in less than 5 minutes. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes