Refrigerator making loud buzzing or humming noise from back.

Safety first: Unplug the refrigerator before cleaning or touching moving parts.

Step 1: Clean condenser coils

• Pull the refrigerator away from the wall.
• Use a coil brush and vacuum to remove dust from the condenser coils and fan area.

Step 2: Inspect condenser fan

• Check the fan blades for debris or obstructions.
• Spin the blade by hand; it should move freely without grinding.
• If noisy or loose, replace the condenser fan motor.

Step 3: Check compressor mounts

• Ensure the compressor mounting bolts and rubber grommets are intact.
• Replace worn grommets to reduce vibration noise.

When to call a technician: If the compressor itself is excessively loud or knocking, a sealed system technician should evaluate it.