June L Royersford , PA January 27, 2019 Appliance: Model WMH53521HZ Microwave light burned out. My husband has always done all home repairs but is now 78 and had Parkinson’s. I just installed a new light bulb, grease filter and charcoal filters myself. This site made finding the right parts so easy! Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes