Luis M Anaheim , CA June 24, 2018 Appliance: Whirlpool 1.7 Cu Ft Microwave MH1160XSY1 Whirlpool Microwave Mh1160xsy1: Broken microwave upper vent grill. How to replace Grill-Vent. Ordered replacement grill. It arrived in 2 days and took no more than 4-5 minutes to install. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes