Loud humming, rattling, or vibrating noise during operation.

Safety: Unplug the unit before adjusting internal components. Use caution when working near the compressor and metal edges.

• Level the appliance: Use a spirit level and adjust the front leveling feet so the Grundig wine cooler is stable and does not rock.
• Check for cabinet contact: At the rear, ensure copper tubing and the condenser coil are not touching the cabinet walls. Gently bend them away if necessary.
• Inspect fans: Listen to identify if the noise comes from the internal or rear fan. Tighten mounting screws and replace the Grundig fan motor if bearings are noisy.
• Secure shelves and bottles: Make sure shelves are fully seated and bottles are not touching the cabinet walls or each other in a way that causes rattling.