K P Brighton , MI December 03, 2018 Appliance: Whirlpool Microwave WMH32519CS1 Whirlpool Microwave Wmh32519cs1: Micro wouldn't work interior light wouldn't come on all other features worked. How to replace Microwave Door Interlock Switch. My bodacious, smart, handsome and kind friend replaced the door switches (3) Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes