Freezer making loud buzzing or humming noise from the rear

Safety: Unplug the freezer before adjusting components at the rear.

Steps to reduce noise:

• 1. Check installation: Ensure the freezer is not touching walls or cabinets that can resonate.
• 2. Inspect rear panel: Tighten any loose screws on the rear service panel.
• 3. Check condenser and pipes: Look for copper tubes touching each other or the cabinet. Gently bend them apart slightly to prevent contact, taking care not to kink lines.
• 4. Inspect compressor mounts: Verify that rubber grommets under the compressor are intact and that mounting bolts are snug but not overtightened.
• 5. Evaluate compressor noise: If the compressor itself is excessively loud or knocking, this may indicate internal wear. Only a refrigeration technician can replace the compressor.

Note: Some humming is normal, but sudden changes in noise level warrant investigation.