Chris K Paola , KS December 14, 2014 Appliance: Whirlpool Refrigerator ET18NKXDN01 Whirlpool Refrigerator Et18nkxdn01: Light not coming on inside refrigerator. How to replace Appliance Light Bulb. Changed light switch on inside door frame. This unit was a bit more difficult than usual as the old switch was "glued" into the door frame with the spray insulation in the factory. I had to break up the old switch to get it to pull out of the frame. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes