(I'd say it's a failed or failing thermostat on the control circuit board or the hood TCO / thermal cutout / thermostat)
And if FixYa would inform us experts when as persons responds to a request for more information, we could reply back quickly.
But since (for some reason) they won't, you'll just have to post a new help request.
But please be sure to include the full model number from the tag on the oven, and exact symptoms - what it's doing or not doing, and when.
Is it set to be off via the control panel?
You can download Kitchenaid / Whirlpool owner's manuals, installation manuals, and parts lists here.
The turntable system consists of the motor, the coupler, the turntable support with rollers, and the tray.
You can see and hear a video of how a turntable motor should sound when you rotate it by hand.
If yours is not set to be off via the control panel, and it won't rotate or it sounds like it's grinding, etc., you may have a bad motor or plastic coupler.
You can find helpful exploded view diagrams and order parts by entering your full model number from the tag here.
