Micheal M Rancho Cucamonga , CA November 10, 2014 Appliance: Whirlpool Microwave Oven MH1170XSS0 Whirlpool Microwave Mh1170xss0: Needed shelf for microwave oven. How to replace Meal Rack. Ordered replacement shelf on Thursday, received on Friday, installed in microwave, fits perfect. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes