Over-the-range Kenmore microwaves do double duty as a range hood, pulling cooking exhaust and grease up through a metal mesh filter before it ever reaches the microwave’s internal fan. That filter is easy to forget about since it’s mounted overhead, out of sight.
What Happens When It’s Neglected
A grease-clogged filter restricts airflow to the ventilation fan motor, which has to work harder to move the same amount of air. Over months of neglect, this added strain is a genuine contributing cause of fan motor failures that would otherwise have lasted years longer.
How Often to Clean It
For a kitchen that cooks regularly, monthly is a reasonable baseline; households that fry or sauté often should check it more frequently. Most Kenmore grease filters slide out without tools and are dishwasher-safe or easy to hand-wash with degreasing dish soap.
A Smell of Burning Isn’t Normal
A persistent burning smell during use, separate from cooking odors, usually means grease buildup has reached the point of scorching against a hot surface inside the unit rather than being pulled through cleanly — worth addressing immediately.
Beyond the Filter
If cleaning the filter doesn’t resolve fan noise or airflow issues, the fan motor itself may need attention. Visit our Kenmore microwave repair page.