KitchenAid · Microwave Oven
It is normal for the microwave oven's cooling fan to automatically turn on and off while the cooktop below is in use. This fan is separate from the vent fan and helps cool the microwave's controls.
Click steps to track your progress.
No action is required as this is a normal operational behavior.
Ensure proper ventilation around the microwave oven.
Continue using the cooktop and microwave as intended.