Refrigerator making loud knocking, banging, or rattling noises during operation.

Safety first: Unplug before touching moving parts.

Step-by-step checks:

• 1. Level the appliance: Use a spirit level and adjust the front feet so the refrigerator is stable and slightly tilted back.
• 2. Check rear components: Remove the rear panel and inspect the condenser fan and compressor mounts. Tighten any loose screws and ensure fan blades are clear.
• 3. Inspect internal fan: In the freezer, remove the rear panel and check the evaporator fan for ice build-up or obstructions.
• 4. Isolate vibrating pipes: If copper or aluminium tubes are touching each other or the cabinet, gently bend them apart and insert foam or rubber spacers.

When to call a technician: Persistent loud knocking from inside the sealed compressor indicates internal damage and requires compressor replacement.