Microwave is excessively noisy during operation (rattling, vibrating against cabinetry).

Safety first: Unplug the microwave before tightening mounting hardware.

• Level the unit: Adjust feet or shims so the microwave sits level and stable.
• Tighten mounts: Check all mounting screws, brackets, and trim kit fasteners. Tighten as needed.
• Isolate vibration: Place thin rubber pads between the microwave feet and the countertop or shelf to reduce resonance.
• Internal panels (advanced): If noise persists, a loose internal panel or fan shroud may need tightening by a technician.