Gregory P Houston , TX December 10, 2018 Appliance: Model MMV4205D-2 Microwave would not work, bad door switch. Checked switch with a voltmeter, determined the switch was bad. Ordered a new switch....watched a short how to you-tube video.....and from there.....it was fixed. 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes