Carol G Waynesville , MO September 01, 2015 The grease filter had broken at the top of it's frame and was letting unfiltered air out the exhaust It was just a matter of opening the vent grill on our Jenn-Air range and taking out the old and replacing it with the new. I do wish all my repairs were that easy. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes