If you purchased a Whirlpool microwave between January 2014 and April 2016 you may need to contact the company for repair.
Whirlpool has issued a recall on microwaves due to a fire risk. The affected Whirlpool brand microwave hood combinations were sold in stainless steel, black and white. To learn if your Whirlpool microwave is on recall you can check the model and serial number online at repair.whirlpool.com. If your microwave is being recalled you should immediately stop using the microwave and unplug the unit.