Rattling or clunking noise when the compressor starts or stops.

Safety first: Unplug the freezer before moving or bending any pipes.

• Check external items: Remove any objects resting on top of or behind the freezer that could rattle.
• Inspect refrigerant lines: At the rear, gently move copper or aluminium pipes away from the cabinet or each other if they are touching and causing noise. Do not kink or sharply bend the pipes.
• Secure with clips: Use foam pads or plastic clips to keep pipes from vibrating against metal surfaces.

Some clicking at start/stop is normal, but loud clunks may indicate internal compressor issues requiring professional attention.