Microwave makes rattling or grinding noises during operation, especially when the turntable rotates.

Safety: Unplug before inspecting inside.

User checks:

• Remove the glass tray and roller ring; clean the cavity floor.
• Inspect the roller ring wheels for flat spots or cracks.
• Check the glass tray for chips or warping.
• Reinstall and test; ensure the tray is seated properly on the coupler.

If noise persists, internal components such as the fan or transformer mounts may be loose and should be checked by a technician.