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Sub-Zero Wine Cooler Major Issues

Sub-zero Wine Cooler Not Cooling

Sub-Zero wine coolers are renowned for their ability to provide the perfect environment for preserving and aging your valuable wine collection. However, when you encounter the problem of your Sub-Zero wine cooler not cooling as it should, it can be a cause for concern. In this blog, we will walk you through a step-by-step troubleshooting guide to help you diagnose and potentially resolve the issue, ensuring that your wines remain in optimal condition.

Wine Storage Temperature Sensor Failure

The temperature sensors in the wine cooler monitor the various temperature settings for each rack. These sensors allow the wine cooler to preserve various varieties of wine at their optimal temperatures. If the sensors fail, you’ll notice a high temperature in the wine storage unit or on one particular rack.

A broken temperature sensor cannot be fixed and must be replaced by a specialist.

Defective Fan

Your wine cooler’s condenser fan draws in cold, room-temperature air and circulates it through the condenser coils to chill the refrigerant. The refrigerant used to cool the refrigerator will not reach the right temperature to complete its work without the fan. A faulty fan should be replaced by a professional as soon as possible since its failure might lead to more complex compressor problems.

Wine Cooler has Dirty Condenser Coils

One of the most common causes of a Sub-Zero wine cooler not chilling is dirty condenser coils. As the refrigerant vapor passes through these coils, it is transformed into a liquid, absorbing the heat from the refrigerator and chilling the inside. The coils will not operate correctly if they are clogged with dust and lint.

Every 6-12 months, we recommend cleaning the condenser coils with these easy steps:

  • Switch off the wine chiller and then hold down the power button.
  • Unscrew both sides of the kick plate at the bottom of the device to remove it. 
  • Get rid of dirt from the coils by using a soft bristle vacuum attachment.
  • The kick plate should be replaced.
  • Hold the power button down to restore power to the machine.

Broken Door Gasket on Wine Cooler

A cracked or unclean door gasket might potentially be why your Sub-Zero Wine Cooler is not cold enough. This gasket keeps cold air from leaking by tight sealing the unit’s door. The gasket will not be able to effectively seal the door if it is unclean or cracked.

  • Turn off the wine chiller.
  • Scrub the gasket gently with a soft wet cloth and dish soap.
  • Remove mildew or mold by using a 1:10 bleach solution.
  • Using a mixture of water and baking soda, remove stubborn stains.
  • Rinse and dry the gasket well.


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