Gertrude H Lewiston , ME December 03, 2019 Appliance: Whirlpool Microwave Oven/Hood 1.7 Cu. Ft. GMH3174XVS1 Whirlpool Microwave Gmh3174xvs1: Grill vent broken. How to replace Microwave Vent Grille. Replaced grill vents Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes