Buzzing or humming noise from the rear that is louder than usual.

Safety first: Unplug the refrigerator before touching rear components.

Check compressor and fan:

• Remove the rear lower panel.
• Ensure compressor mounting bolts and rubber feet are intact and secure.
• Inspect the condenser fan for dirt buildup; clean blades with a soft brush.
• Ensure no wires or tubing are touching the fan blades.

Reduce vibration:

• Ensure the fridge is level and not touching adjacent cabinets.
• Place anti-vibration pads under the front feet if necessary.

Note: Some humming is normal. Focus on new, louder, or irregular noises that indicate a developing fault.