Microwave makes a rattling or scraping noise when the turntable rotates.

Steps:

• Remove and clean: Take out the glass tray and roller ring. Clean both and the cavity floor thoroughly.
• Inspect roller ring: Check for flat spots, cracks, or missing rollers. Replace if worn.
• Check glass tray: Ensure the tray is not chipped or warped and sits flat on the roller ring.
• Inspect coupler: Verify the turntable coupler is not bent or damaged.

Note: Minor noise is normal, but persistent scraping indicates a support issue that should be corrected to avoid motor damage.