Dawn S Kalamazoo , MI February 14, 2015 Appliance: Whirlpool Microwave MH7140XFQ1 Whirlpool Microwave Mh7140xfq1: Broken vent grill on a microwave. How to replace Microwave Vent Grille. Just snaps in Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes