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What To Do If Your Sub-Zero Refrigerator Won’t Start

What To Do If Your Sub-Zero Refrigerator Won’t Start

Today, Sub-Zero is singlehandedly one of the best manufacturers of refrigerators and freezers in North America. 

But that doesn’t mean that you should forget about your appliance.

After all, you rely on your refrigerator, which means that regular maintenance is going to be essential for keeping your Sub-Zero refrigerator running efficiently for all the years to come. 

However, sometimes maintenance isn’t enough. 

So what should you do if your sub-zero refrigerator won’t start?  

Keep reading, and in the following article, we’ll take a look at how you can safely troubleshoot the issue, and get your fridge up and running in no time.

Be Sure To Check Your Circuit Breakers

If your Sub-Zero refrigerator doesn’t start, check the circuit breakers to ensure that you’re actually getting power at the outlet that your unit is plugged into. 

But, before you check the circuit breakers, remember to unplug your appliance, which will prevent any potential power surges from causing any damage. 

  • Go to your circuit breaker panel. 
  • Open the panel and check to see if the circuit breaker is in the ‘off’ position. 
  • Turn the switch to the ‘on’ position. 

Then, plug your Sub-Zero refrigerator back into the outlet, and, with any luck, your appliance should start. 

If the circuit breaker continues to turn off, you likely have a short somewhere within your unit itself, or in your home’s electrical wiring. 

Don’t let this electrical problem get worse. Call a local electrician or a professional appliance technician for help right away. 

circut breaker tripping

Starting A New Refrigerator

Have you recently purchased a new Sub-Zero refrigerator? If so, congratulations on making an awesome investment in your home! 

One thing you should know, however, is that when you plug-in your new Sub-Zero refrigerator, it will take up to 24 hours for it to cool down properly, and reach the desired temperature.

So while it might look like the appliance isn’t working properly, it is, in fact, doing its job. 

In this case, just make sure to give your refrigerator the time it needs to cool down before you attempt to troubleshoot any other issues.

New Sub-zero refrigerator

When to Contact an Appliance Repair Technician

Let’s say you’ve waited 24 hours, and your sub-zero refrigerator still hasn’t started. You’ve also checked the circuit breakers and the power outlet. 

At this point, if you can’t identify the problem, it’s a good idea to contact a professional appliance repair technician.

There’s a huge advantage to contacting a technician, especially if you don’t have any experience in appliance repairs. 

In some cases, you could end up causing more damage to the appliance, whereas a trained appliance technician will have your refrigerator starting up again in no time, while also ensuring to keep your warranty intact. 

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Problems with temperature controls

One reason your Sub-Zero refrigerator won’t start might have to do with the temperature controls or thermostat. 

The temperature controls in your Sub-Zero refrigerator work to keep the interior cool when it starts to warm up, and they’ll also shut off the unit when it reaches the desired interior temperature. 

For example, you can set your sub-zero refrigerator set to 38 degrees Fahrenheit (the recommended setting). And when it reaches this temperature, the thermostat will then stop the unit from getting any colder. 

If there’s a problem with the temperature controls, your sub-zero refrigerator won’t be able to maintain or regulate its temperature. 

Also, the food you store in the appliance might start to go bad. 

You can tell your temperature controls aren’t working if you smell strong odours inside the refrigerator. You can also tell by how cold drinks feel. If they feel warm to the touch, the temperature isn’t right.

Sub zero refrigerator temperature controls

Need A Hand? Call In The Pros!

To find out whether or not you should replace the temperature controls, contact a repair technician. They can run a proper test to determine the best course of action.

Broken Main Board

The mainboard is the most important electronic component of your Sub-Zero refrigerator. It is the part of the refrigerator that gives it commands and instructions for cooling. Essentially, it’s the “brain” of your appliance.  

If the mainboard is broken, your sub-zero refrigerator will likely start to malfunction in any number of ways, which means the temperature won’t be regulated, or the refrigerator won’t start. 

It’s usually pretty easy to tell whether or not your mainboard is broken. 

Try pressing the buttons on the control board. If they don’t work or respond to your touch, a broken mainboard is the most likely issue. 

You can try to reset the mainboard by unplugging your Sub-Zero refrigerator, waiting a minute or two, and then, plugging the appliance back into the outlet.

If the mainboard still doesn’t work, reach out to a repair technician. They will properly replace the broken mainboard or any other faulty components, ensuring that your fridge will be up and running in no time. 

Sub zero refrigerator main board

Malfunctioning Compressor

If you suspect your Sub-Zero refrigerator compressor is malfunctioning, pull the appliance away from the wall. Listen to the back of the refrigerator for a slight humming sound. If you can’t hear a slight hum and the refrigerator temperature is too high, you’ve likely found the problem. 

The compressor contains a refrigerant (freon) that helps keep your Sub-Zero refrigerator maintain its cold temperature. 

If the compressor isn’t circulating the refrigerant properly, the appliance won’t be able to function properly.

Sub zero refrigerator compressor

Sub-Zero Refrigerator Maintenance and Repair

While it’s possible to try and troubleshoot a Sub-Zero refrigerator that won’t start on your own, it’s always best to contact a repair technician.

Professional repair technicians, like the ones you’ll find at Phoenix Appliance Pros diagnose and repair appliance problems fast. 

So, if you’ve got an appliance issue, reach out and get your Sub-Zero refrigerator running again today. 

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