Microwave is very noisy during operation (rattling, grinding, or scraping sounds).

Safety: Unplug the microwave before inspecting moving parts.

Steps:

• 1. Turntable system: Remove the glass tray and roller ring. Clean the cavity floor. Inspect the roller ring for flat spots or cracks and replace if damaged. Check the coupler for wear.
• 2. Test without tray: Run the microwave briefly with only a cup of water and no tray to see if the noise changes. If the noise disappears, the issue is with the tray/roller system.
• 3. Fan noise: If noise persists, it may be from the cooling or convection fan. A grinding or scraping sound from the rear or side suggests a failing fan motor or debris in the blades.

Advanced: A technician can access and replace noisy fan motors or blower assemblies using Sharp parts.