How to check

Remove turntable.
Remove and clean turntable support and rollers.
Replace turntable support.
Replace turntable.
Place one cup (250 mL) of water on the turntable in a microwave safe measuring cup; then restart microwave oven.
Verify microwave oven operation.

Note: Replace turntable immediately after cleaning. Do not operate the microwave oven without the turntable in place.