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 Diffuser. 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