Rattling or clanking noise when the compressor starts or stops.

Unplug the cooler before adjustments.

• Inspect rear components: Check that the condenser coil is firmly attached to its brackets and that brackets are tight.
• Separate tubing: Where copper or aluminum lines touch, insert small pieces of foam or rubber to prevent metal-on-metal contact.
• Secure compressor: Tighten compressor mounting bolts if they are loose, but do not overtighten to the point of crushing the grommets.
• Check surroundings: Ensure the cooler is not touching cabinets or walls that can amplify vibration.

Persistent loud mechanical noises may indicate internal compressor damage and require professional diagnosis.