Sub-Zero Wolf Fridge Problems: 7 Common Issues (Must Know)

Sub-Zero is one of the most dependable appliance brands, famous for its unique manufacturing style and high-quality builds that can last for decades to come.

But like every other appliance brand, Sub-Zero isn’t perfect, and you may notice some issues coming into the light as you continue to use its products.

This article will discuss the 7 common problems in Sub-Zero fridges and how you can get rid of them for seamless operations.

Let’s start.

Sub-Zero Fridge Not Cooling

A common issue with Fridge Freezers is that the fridge compartment does not cool or perform inadequately.

Common causes of a Sub-Zero refrigerator not cooling is it’s not plugged in, incorrect temperature settings, the door is not closing tightly, the seals are broken, the vents are clogged, or the condenser is unclean or broken.

This issue can be a switch turned off, or the plug is incorrectly lodged inside the socket.

Another reason can be a defective fuse caused by irregular wiring.

Possible Solution(s):

  • If your Sub-Zero refrigerator is not cooling, the temperature setting may be too high. The electronic temperature control on your refrigerator should be set to 38°F for proper cooling.
  • Double-check to ensure that the power switch is correctly turned on and the power cable is correctly connected to the electrical socket.
  • Fridge doors that do not close properly and damaged or worn-out seals are common causes of refrigerators not cooling.
  • Check the door switch, since most refrigerators prefer not to run the condenser unless the door is positively closed.
  • If your refrigerator is in direct sunlight or close to a heat source, consider relocating it if possible.
  • A set of condenser coils can be found at the back of your Sub-Zero refrigerator.

When these coils become dusty or freeze over, they can prevent your refrigerator from cooling.

Cleaning the condenser coils is thankfully simple; simply do the following:

  • Remove your Sub-Zero refrigerator from the wall.
  • Turn off the power.
  • Remove the condenser coils’ cover.
  • If the coils are encrusted with ice, turn off your refrigerator and wipe away any excess water. Clean the coils if they are covered in dust.
  • After they’ve been defrosted or cleaned, replace the coil cover, turn on the power, and see if your fridge now cools properly.

Sub-Zero Refrigerator Stopped Making Ice

A common issue with Sub-Zero refrigerators is that they stop producing ice, which owners become accustomed to and miss when it is no longer available.

When the ice maker in a Sub-Zero refrigerator stops working, it is usually due to a blockage in the supply lines or faulty components.

Don’t worry; simply follow the steps below to resolve the issue.

Possible Solution(s):

Inlet Valve is Blocked

The ice maker gets its water from the house’s main supply line, and a blockage in the valve that lets the water into the fridge could be the reason for your machine’s failure to manufacture ice.

So, turn off the mains water to this valve and remove the input tubing to determine whether there’s a clogged tiny debris screen on it.

If this is the case, clean the screen so that water can flow back into the ice machine.

Check the inflow tube for clogs and make sure the manual water shut-off valve is clean and clear on the inside.

Faulty Components

One of the ice maker’s components may be defective.

You may need to purchase and replace the entire ice maker assembly because many of the ice maker components are not offered separately.

Check the water intake valve, water line, and fan before replacing the ice maker unit.

Replace the ice maker assembly if none of these pieces are broken and the freezer temperature is at least 15 degrees Fahrenheit.

Sub-Zero Refrigerator is Noisy or Loud

Sitting in the lounge wanting to watch your favorite show on the television and all you can hear is the hum of the fridge. It can’t be ignored however hard you try.

The most common cause of a Sub-Zero refrigerator is noisy or loud is due to dirty or faulty components.

Don’t worry; simply follow the steps below to resolve the issue.

Possible Solution(s):

Filthy Compressor

A dirty compressor is frequently the source of the loud humming. The heat is dissipated by the compressor coils in the rear of your refrigerator, but as they become caked with dust, they must work harder and louder to dissipate it.

Cleaning your compressor coils will often remedy this problem quickly.

Faulty Compressor

If you’ve cleaned the debris from the compressor and the fridge is still humming like a freight train, it could indicate a compressor problem.

When the compressor shuts off, you may also hear knocking or clunking sounds.

This is just another clue that the compressor’s internal components have failed.

Sub-Zero Refrigerator No Longer Defrosting

One of the most common problems that all refrigerator owners face is a malfunctioning defrost system.

A faulty defrost timer is typically to blame for a Sub-Zero refrigerator that no longer defrosts.

Don’t worry; simply follow the steps below to resolve the issue.

Possible Solution(s):

Faulty Defrost Timer

A defrost timer is the most likely culprit. So, what exactly is the defrost timer?

The defrost timer activates the defrost heater numerous times during the day to melt any ice that has built up on the evaporator coils.

If the defrost timer is malfunctioning, the defrost cycle may not start or power to the defrost heater may be cut off during the defrost cycle.

Slowly move the dial into the defrost cycle to see if the defrost timer is malfunctioning.

The heater should be turned on and the compressor should be turned off.

The defrost timer is not progressing if the timer does not send electricity to the defrost components or advance out of the defrost cycle within 30 minutes.

Replace the defrost timer if it is not progressing.

Sub-Zero Fridge Leaking Water

Occasionally Sub-Zero customers report water leakage from the refrigerators, creating a mess in the kitchen and ruining hardwood floors.

Sub-Zero fridge leaking water is typically caused by a clogged defrost train, frozen enough to disrupt the water flow, or a leak in the water tank. 

A frozen defrost train can cause the water to leak or drip down the compartment that holds the defrost train.

To fix this issue, you can either boil the ice out or flush the drain with boiling water to get rid of the ice and any debris causing the blockage.

Another reason for water leakage can be a broken water tank.

If you find a leak in your water tank, consider replacing it entirely, as adhesive glue won’t do the job quite well due to the plastic nature of the tank.

If your refrigerator is still leaking, you can check the water inlet valve to see if it is in working condition.

A loose crack fit can cause the water to drip down from the valve, so ensure that you tightly screw it in place or replace it if broken.

Sub-Zero Freezer Compressor Switching on Randomly for More Prolonged Periods:

Often Sub-Zero freezers run into an issue of their compressor switching on more frequently than usual. In such a scenario, the compressor runs more often and wastes energy.

This anomaly can happen if the ventilation gaps located in the housing units get clogged by excessive dirt or debris.

Another possible reason could be keeping your freezer door open for a long time, causing a thick layer of ice to form inside the cabin.

Possible Solution(s):

Make sure you’re not blocking any ventilation gaps by cleaning them regularly. Please do not open the freezer door excessively and ensure that you’ve closed it after each use.

If there’s a lot of unnecessary ice, you can defrost the appliance and place it in a cooler place.

Sub-Zero Freezer Has Strange Noises After Instalment

If you hear strange noises coming from the Sub-Zero freezer after you’ve just installed the appliance, you are dealing with a minor issue.

The primary reason can be an incompatible alignment of the device with the floor or a piece of furniture creating the noise as it’s pressed against one of the freezer’s walls.

Possible Solution(s):

Ensure that you’ve aligned the appliance correctly and remove any hindrances at the back causing the freezer to make noise.

Unclip the cables if you haven’t done it already and secure all the appliances’ removable parts. Also, ensure that no bottles and items and rattling against each other inside the freezer compartment.

Sub-Zero Refrigerator Light Not Working:

If you notice that the Sub-Zero refrigeration light has stopped working, you may be looking at an issue with the Super Freeze technology.

A common indication of this problem is that the Super Freeze light does not turn on when you press the designated button.

Possible Solution(s):

Replace the malfunctioning light through Sub-Zero’s customer service offerings. If the problem still isn’t resolved, you may be dealing with a broken fuse, and it is best to call a service person to help you out.

Sub-Zero Freezer Unpleasant Flavor in Ice Cubes:

The ice cubes in a Sub-Zero freezer often get an unpleasant odor/flavor in them, possibly ruining a perfect can of beer.

Don’t worry; this problem is caused if you are not using your icemaker frequently or the container is dirty due to cleaning negligence.

Uncovered food items inside your freezer can also cause this issue.

Possible Solution(s):

Use your icemaker more frequently and clean out the container thoroughly before turning the appliance on again.

Also, make sure that the food items inside the compartment stay packed within airtight containers, so no odor seeps into the ice.

Sub-Zero Fridge Door Not Closing Properly

Cold air can escape, and warm air can enter the compartment if the refrigerator door does not close tightly or create a proper seal. Condensation can form inside the refrigerator, causing the compressor to work harder than required.

The majority of these repairs are neither difficult nor expensive. Your user manual will detail any adjustments you can make safely and without voiding your warranty, but if in doubt, consult a specialist.

Sub-Zero fridge door not closing properly due to worn seals, tilted hinges, crisper drawers sticking out, or misaligned shelves.

Don’t worry; simply follow the steps below to resolve the issue.

Possible Solution(s):

  • Check inside the fridge to ensure that the crisper drawers and shelves are properly positioned and are not protruding and preventing the door from closing. After checking, make sure no cartons or containers (milk bottles, for example) are sticking out and preventing the door from closing properly. If you’re still having issues, proceed to the next step.
  • Examine the rubber door seal (gasket). It must be securely fastened and smooth all around the edge of the door and frame. If it’s loose or twisted, you may be able to reposition it temporarily, but it should be replaced.
  • Check that your appliance is properly balanced. If the floor is not level, use a spirit level and adjust the feet. The back of the fridge should be slightly lower than the front.

If the problem persists, it is best to contact a qualified technician.

How Long Should a Sub-Zero Fridge Freezer Last?

Sub-Zero offers one of the most reliable appliances that last for a more extended period than many other brands. Experts argue that Sub-Zero fridges can last up to 20 years if you properly take care of them.

Sub-Zero’s excellence and reputation primarily revolve around its longevity to general users. Hence, quality-conscious customers often ignore the hefty price tag accompanying most Sub-Zero fridges.

Are Sub-Zero Fridges Any Good?

Yes, Sub-Zero fridges are very good. Sub-Zero being a premium appliance brand comes which comes with it high-functioning food preservation system. 

Sub-Zero is a top brand of high-end kitchen appliances. With a Sub-Zero refrigerator, you get excellent performance, dependability,

Sub-Zero is a premium appliance brand with premium features throughout its entire refrigerator line.

These features include:

  • Full-size built-in refrigerators, fully flush integrated models, infinite paneling options, limitless configurations, and a wide range of under-counter options for a professional and seamless appearance in your home.
  • Food Preservation: The temperature and humidity in the refrigerator and freezer are controlled by two separate sealed refrigeration systems. This keeps the separate compartments at optimal humidity levels and preveflavorvour transfer.
  • Vacuum Seal: Sub Zero appliances have a patented vacuum door seal system that aids in temperature maintenance. When you close the door, the unit’s four sides vacuum seal.
  • Design flexibility: comes with a plethora of installation, configuration, dimension, and finish options

What the Review Say


Reliable. We had a small problem with our ice maker and the Sub Zero company was very fast to take care of it and very professional. Other than that we haven’t had any other issues and the refrigerator is at least 10 years old if not older!



Have had it for 21 years. Very good. Not too many problems. Use a private person to fix it. Much cheaper. Mine is built in, really nice. I enjoyed it, a big nice size freezer room for everything. If I ever need a new one would buy it again.



Excellent commercial-grade fridge. Looks more than good enough (stainless steel), to blend into a home setting. Rock solid performance. Excellent controls and a great freezer section. Model 650, with a bottom freezer. Twelve years on, and not a single issue.



Pros and Cons

Here are some of the pros and cons of the Sub-Zero Fridge Freezers


  • Premium built fridge
  • Feature-laden appliance
  • Energy efficient
  • Magnetic door seal system
  • Air purification system
  • Water-filtration system


  • Expensive


After reading this article, you should be well aware of all Sub-Zero fridges offer and how to troubleshoot your appliance at home without a hassle.

If you notice any other issues, contact the Sub-Zero support team immediately and get them fixed.

Remarkably, Sub-Zero rarely runs into trouble, so it is safe to say that you’ll only need this article once in a blue moon to get your appliance working correctly again. Cheers!

Related Articles