Domenic I San Clemente , CA January 12, 2016 Appliance: Whirlpool Refrigerator WSF26C3EXW01 Whirlpool Refrigerator Wsf26c3exw01: Control door in the diffuser broken in open positon causing fridgerator side to freeze contents. How to replace Refrigerator Air Damper Diffuser Assembly. Easy access and simple replacement of the Diffuser by removing 3 Hex nut screws. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes