Microwave is excessively noisy during operation (rattling, grinding, or vibration).

Safety first: Unplug the microwave before tightening screws or accessing internal parts.

• Step 1 – Check load: Ensure the glass tray and cookware are properly centered and not contacting cavity walls.
• Step 2 – Inspect roller ring: Remove and check the roller ring for flat spots or debris; clean or replace if worn.
• Step 3 – Tighten screws: Gently tighten any loose exterior screws or mounting brackets (for built-in/hood models).
• Step 4 – Fan inspection: If noise seems to come from the back or top, the cooling or convection fan may be worn or obstructed and should be inspected and replaced by a technician.