refrigerator not cooling

Sub-Zero Refrigerator Is Not Cooling? No Worries! Here’s How You Can Fix The Issue

Today, when it comes to choosing the best refrigerator out there today, Sub-Zero is certainly one of the brands we advise you to consider. Unarguably, Sub-Zero refrigerators often come with hefty price tags. As long as you can afford the price tag, we advise you for it because Sub Zero appliances are often built to last for a long time. Another reason why Sub-Zero’s refrigerators are worth buying today is that they have great resale value.

As amazing as Sub-Zero’s appliances are, you need to keep in mind that they also have their issues. One common problem you may encounter is your refrigerator not cooling. If this is exactly the issue you’re currently experiencing, we advise that you hire a reliable Sub-Zero-certified company, such as Wilshire Refrigeration And Appliance to help service your refrigerator.

In the rest of this post, you’ll discover a few factors that cause a ‘refrigerator not cooling’ issue and how to avoid them:

1.  Dirty Condenser Coils

One of the main factors that cause a ‘Sub-Zero refrigerator not cooling‘ issue is dirty condenser coils. Normally, the condenser coils are specifically designed to help cool the refrigerant and continuously eliminate the heat from your Sub-Zero appliance. This process often continues until the air inside the freezer & fridge reaches a certain required temperature.

However, when the condenser coils become dirty or clogged, they struggle to perform the aforementioned function of expelling heat from the Sub-Zero refrigerator. This explains why you may be experiencing this ‘Sub-Zero refrigerator not cooling’ problem.

  • Well, there are a couple of reasons why your condenser coils may become clogged or dirty. One of them is the location of the coils and the condenser fan, which is designed to blow air over the coils.
  • With this location, it’s a lot much easier for dust, dirt, and even your pet hair to cover the condenser coils, preventing the coolant from doing its job correctly.

2.  Your Appliance Is Not Level

If your Sub-Zero refrigerator is not level, it may also affect the cooling performance of the appliance. In this case, your refrigerator’s doors may not be sealed the right way, resulting in the loss of cold air.

One effective way to address this issue is by adjusting your refrigerator’s levelling legs until you achieve balance.

3.  Sub-Zero Sabbath Mode Is Active

One of the amazing features of most Sub-Zero refrigerators is the sabbath mode. Enabling this feature means you want your appliance to turn off the ice maker system and a couple of other functions, such as door alarm and interior lights.

That said, if your refrigerator is not cooling, it could be that the appliance is currently in sabbath mode. If yes, we advise you to check your instruction manual to learn exactly how to exit sabbath mode.

4.  Faulty Condenser Fan Motor

As you already know, both the condenser coils and condenser fan motor work hand-in-hand. As the fan motor works, outside air is driven into the condenser coils and the refrigerator’s compressor. However, when the condenser fan motor becomes faulty, the coolant will struggle to get cold air, which is necessary to keep your appliance cool.

Well, by hiring a reliable and Sub-Zero-certified technician, such as Wilshire Refrigeration And Appliance, you can always repair your appliance’s condenser fan motor.


In conclusion, a non-cooling Sub-Zero refrigerator can be a worrisome situation, but the solutions provided offer a reassuring path to resolving the issue. The troubleshooting steps outlined above, from checking the power source to inspecting the condenser coils, provide a systematic approach for diagnosing and rectifying the problem. The Sub-Zero brand is known for its high-quality appliances, and understanding how to address cooling problems ensures that these investments continue to function optimally. By following the recommended troubleshooting steps, users can restore their refrigerator’s cooling efficiency and prolong the life of this essential kitchen appliance.