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Why Is My Sub-Zero Refrigerator Not Getting Cold Enough?

sub zero refrigerator is not cold enough

Investing in a Sub-Zero refrigerator means your food should have no trouble staying cold. So if you find your Sub-Zero refrigerator not getting cold enough, it can be disappointing. Fortunately, many cooling issues can be diagnosed and fixed with some maintenance or simple adjustments.

5 Common Causes for a Sub-Zero Refrigerator Not Getting Cold

A Sub-Zero refrigerator not getting cold enough may not require professional repair service. Our troubleshooting tips start with the simplest reasons for temperature issues to determine if a DIY fix can do the trick.

#1. Check for Refrigerator Error Codes

If your Sub-Zero refrigerator is not cold enough we first recommend checking the control panel for error codes. These codes correspond to a particular problem that can help decipher temperature issues. If the control panel is displaying a code, check your user manual to determine what the code signifies.

#2. Refrigerator Temperature Set Too High

Your Sub-Zero refrigerator won’t cool sufficiently if the internal temperature is set too high. If your refrigerator has an electronic control panel, check the temperature setting to make sure it’s set appropriately. Sub-Zero recommends a temperature of 38°F for optimal cooling. 

If your refrigerator temperature is set with a control dial, Sub-Zero suggests setting it between 4-6 for the refrigerator to cool appropriately.

#3. Sub-Zero Refrigerator Door Not Closing Properly

Always make sure the door to your refrigerator is properly closed and sealed. If the door is left ajar or blocked from closing appropriately, warm air will enter while cold air escapes, raising the refrigerator’s temperature. Here’s how to check the refrigerator door when you find your Sub-Zero refrigerator not getting cold:

  • Avoid leaving the door ajar for extended periods of time. Set the door alarm feature to alert you if the door remains open for too long.
  • Make sure there are no items that block the door from closing properly.
  • Check the door gasket for rips, tears, or other damage. A damaged gasket requires replacement.

sub zero refrigerator not getting cold

#4. Dirty Sub-Zero Refrigerator Coils

Refrigerator coils help cool refrigerant, providing cool air for the refrigerator. If the coils get dusty or dirty, they’re unable to cool the refrigerant as efficiently and the refrigerator’s temperature may rise.

It’s recommended that you clean refrigerator condenser coils every 6-12 months to ensure proper function. Here’s how to clean Sub-Zero refrigerator coils in 6 simple steps:

  1. Turn off your refrigerator’s power at the control panel.
  2. Remove the grille on top of the refrigerator.
  3. Gently brush the condenser coils with an appliance brush to loosen dust and debris.
  4. Use a vacuum hose attachment to clean up any lingering dust and lint.
  5. Replace the top grille.
  6. Restore power to the refrigerator. Allow 24 hours for it to reach its set temperature.

#5. Refrigerator Fan Motor Failure

A repair may be unavoidable if you find a Sub-Zero refrigerator fan not running appropriately. The refrigerator’s evaporator and condenser fans blow cool air over the different coils that circulate refrigerant in its gas or liquid form. This important function helps cool the refrigerant and supply the refrigerator with cold air.

If either fan motor operates loudly or the blades don’t turn easily by hand you’ll notice your Sub-Zero refrigerator not getting cold. In these cases, the evaporator or condenser fan motor needs to be replaced.

The professionals at DeserTech can help with any Sub-Zero refrigerator repair. Call us for expert service.

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