A:Answer Hi gigi. Thank you for your question. Due to the Cooking modes in the upper microwave Speed oven in Model HBL8753UC, including: 12 Auto Programs (including Auto Defrost, Melt Butter, Soften Ice Cream, Pizza), 9 Sensor Cook Programs, 9 SpeedChef® Programs, Hi & Lo Broil, European Convection,Keep Warm, Frozen Foods, the Use and Care Manual states: Note:Do not use the appliance if the turntable is not in place. Confirm that all parts are properly seated and that
the turntable rotates freely when the microwave is operated. For more information, here is the link to the Use and Care Guide: https://media3.bosch-home.com/Documents/9001404966_A.pdf
