Thomas M Bloomsburg , PA March 26, 2017 Appliance: Model 721.62649200 Broken vent grille and dirty grease filters that didn't clean up very well Ordered new vent grille and 2 new grease filters(these showed out of stock on the website but the customer service rep found them). Save the old screws, ones don't come with the new grille. Took about 15 minutes. New grille was an exact match and went right in. On my model it's easier to get the grille in place with the microwave door open. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes