Freezer making loud buzzing or humming noise from the rear, louder than usual.

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

Steps:

• 1. Level the appliance: Use a spirit level and adjust the front feet so the freezer is stable and does not rock.
• 2. Check rear tubing: Inspect the condenser coils and refrigerant lines at the back. Gently bend any tubes that are touching the cabinet or each other to create a small gap.
• 3. Compressor mounts: Ensure the compressor is firmly held by its rubber mounts. If a mount is broken or missing, have it replaced to reduce vibration.
• 4. Noise isolation: Place anti-vibration pads under the freezer feet if it is on a hard floor.
• 5. Persistent loud knocking or grinding: This may indicate internal compressor damage; contact a technician for evaluation and possible compressor replacement.

Note: Some humming is normal, but sudden changes in noise level should be investigated.