Jeff P Jonesboro , AR March 05, 2020 Appliance: Kenmore Microwave 72166993800 Kenmore Microwave 72166993800: Door switch was fried. How to replace Microwave Door Switch. Very simple. Push down a tab. Pivot the switch. Slide it off the plastic post. Remove the electrical wire tabs. Reverse install. I located the bad switch noticing it's electrical connection was a darker color than to other one at the top. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes