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Sub-Zero Refrigerator Not Cooling

There are a number of possible reasons why your Sub-Zero Refrigerator isn’t cooling properly. Some of them are simple fixes, so before you call the handyman or start using your fridge as a storage space, check your fridge for a few of the most common problem causes.

sub zero refrigerator not cooling

Reasons A Sub-Zero Refrigerator Isn’t Cool

Error Codes

The easiest way to figure out why your Sub-Zero refrigerator is not cooling is to check the electronic control panel for error codes or service indicators. If there is an error code, check your user manual or call the customer service line for troubleshooting instructions. If you’ve checked for codes and still don’t know what’s wrong, continue down the list checking for common problems.

Temperature Control Settings

Make sure that your refrigerator is set to the correct temperature. If your fridge has an electronic control panel, the factory setting temperature is 38°F. On a dial control, the temperature should be set between 4 and 6. Once you set the temperature, allow the refrigerator 24 hours to return to normal temperature, and if you still have a warm refrigerator on your hands, continue troubleshooting.

Dirty Condenser Coils

Most Sub-Zero refrigerators have condensers above the refrigerator, where refrigerant passes through the condenser coils in order to cool the unit. Those coils tend to collect debris over time, making it hard for the refrigerator to cool efficiently. To expose the condenser coils you may have to remove the grille. If you notice that the coils are dirty, unplug the refrigerator and clean the coils.

Condenser Fan Motor

If the coils are clean and your refrigerator still isn’t cooling properly, you’ll want to check the condenser fan. While the refrigerator is turned off, look for a fan that draws air through the condenser coils.

Make sure nothing is obstructing the fan, and try turning the fan blade by hand to see if it’s stuck or clogged with debris. If it doesn’t spin freely, replace the condenser fan motor. If it spins freely but not continuously, you’ll also need to replace the fan motor.

Evaporator Fan Motor

If you have a refrigerator with a freezer compartment, check the freezer compartment to see if it is still cooling properly. If the freezer compartment is cold but the refrigerator isn’t, then you’re probably dealing with an Evaporator Fan Motor malfunction. The evaporative fan is usually located in the freezer compartment. If the fan is noisy, doesn’t turn freely, or doesn’t turn continuously, replace the fan motor.

If you’ve checked for all of these common problems and your Sub-Zero refrigerator is still warm or not cooling consistently, you can check the troubleshooting section on Sub-Zero’s website. If you still can’t figure out what’s wrong consider contacting Sub-Zero customer service or contact Sub-Zero Factory Certified Service to schedule a repair appointment.

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