Carol H Seattle , WA November 05, 2018 Appliance: Whirlpool 1.8 Cu Ft Microwave MH3184XPS5 Whirlpool Microwave Mh3184xps5: The microwave vent broke. How to replace Vent Grille. Re-ordered the part from AppliancePartsPros and installed it. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes