Charles S Arcadia , MO June 21, 2020 Appliance: Whirlpool Microwave Oven/Hood 1.9 Cu. Ft. WMH32L19AS0 Whirlpool Microwave Wmh32l19as0 / : Door switch failure. How to replace Microwave Door Interlock Switch. If one switch is bad the others may not be far behind. All door switches replaced. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes