Sub-Zero Compressor Mount or Tubing Knock

Wine cooler makes a loud banging or knocking noise when the compressor starts or stops.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Loose compressor mounting grommets, Refrigerant lines contacting cabinet, Normal refrigerant flow noise amplified by installation, Loose internal components near compressor

How to Fix / Troubleshooting

Safety first: Disconnect power before accessing the compressor compartment.

Step 1 – Inspect compressor mounts

  • Remove the rear access panel and check the rubber grommets under the compressor.
  • Tighten mounting hardware if the compressor can move excessively.

Step 2 – Check tubing clearance

  • Look for copper lines touching the cabinet or each other.
  • Gently bend them away slightly to create clearance, being careful not to kink the tubing.

Step 3 – Verify installation

  • Ensure the unit is not hard‑coupled to cabinetry; add thin isolation pads if needed.

Note: Some clicking and gurgling is normal, but loud bangs should be addressed to prevent damage.

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Repair Difficulty

Medium 3/5

Required Part

Compressor Mounting Grommets
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