Sub-Zero Ice Maker Repair

We repair the ice makers inside Sub-Zero freezers and Sub-Zero undercounter ice machines, tracing slow or stopped ice to water supply, freezer temperature, the ice maker itself or the drain. Most of these are moderate repairs, well worth doing on a built-in.

Call (206) 350-0055 Request a visit online

$149 diagnostic, credited to the repair
Licensed, trained & insured
Parts & labor warranty
OEM parts
Mon–Sun, 8 AM – 8 PM

Independent service by Appliance Repair Pros. Not affiliated with, authorized by, or endorsed by Sub-Zero.

Sub-Zero ice maker problems we see

No ice, but the freezer is cold. When the freezer holds temperature and the bin stays empty, the cause is usually upstream: a closed supply valve, a clogged filter, low water pressure, a frozen fill tube or a failed water valve.
Small, hollow or clumped cubes. Short fills make small or hollow cubes. Clumping usually comes from cubes that partly melt and refreeze, which points to a freezer running warm or a door that is not sealing.
Undercounter ice machine runs but the bin stays low. A standalone ice machine makes ice on a chilled surface and then releases it. Scale on that surface, a weak water supply or a sensor fault slows production long before it stops.
Water in the bin or on the floor. Undercounter ice machines have to drain melt water and rinse water. A clogged gravity drain or a drain pump that cannot keep up backs water into the bin or onto the floor.
Dispenser jams or will not deliver ice. On models with a through-door dispenser, ice that has fused in the bin, a stuck auger or a door flap that will not open stops delivery even when the ice maker is working.

One Sub-Zero ice maker lives in the freezer section of a refrigerator or freezer column; the other is a standalone undercounter machine that does nothing but make and store ice. Sub-Zero ice maker repair covers both. They stop for some of the same reasons, but they are built differently, and we diagnose them differently.

For the rest of the lineup, our Sub-Zero brand page has the overview. This page is only about ice.

Two kinds of Sub-Zero ice makers

Ice makers inside a freezer

These fill a mold with water, let the freezer freeze it, then release the cubes into a bin. The ice maker depends on three things outside itself: a steady water supply through the filter and water valve, a freezer cold enough to freeze the mold, and a control that tells it the bin needs more ice. If any of those is off, the ice maker gets blamed for a problem that is not its fault.

Some Classic models also have a through-door dispenser. That adds an auger, a motor and a door flap to the path between bin and glass, and each can stop ice from reaching you even when the ice maker is producing normally.

Undercounter ice machines

A standalone ice machine has its own small refrigeration system. Water runs over or into a chilled surface, freezes, and is released into the bin by warming the surface briefly. These machines also need a drain. Depending on the installation, melt water and rinse water leave through a gravity drain or a drain pump. Drain problems are one of the most common reasons these machines stop or leak.

Scale and biofilm matter more here than in a freezer ice maker, because water flows across the freezing surface every cycle.

What we check on a visit

We start with the water. We measure flow at the valve, check the filter date, and look for a frozen fill tube, which is common when a water valve leaks slightly or the freezer runs too cold near the fill point.

Next comes temperature. For a freezer ice maker, we confirm the freezer and the ice maker mold are reaching temperature. If the freezer itself is running warm, the real repair belongs to the freezer, and we tell you that.

Then we test the ice maker itself. We run a forced harvest through the control and watch the fill, freeze and release in sequence. On a dispenser model, we test the auger motor and the door flap separately.

For undercounter machines, we add a check of the drain path or pump, the condition of the freezing surface, the water distribution, and the bin sensor that tells the machine when to stop.

Our ice maker repair page covers how we approach ice makers from other brands as well.

What you can check first

These checks are safe, and they solve a fair share of calls:

Make sure the ice maker is turned on. On many units that is a setting on the control panel, and it is easy to switch off by accident while cleaning.
Check that the shutoff valve feeding the refrigerator or ice machine is fully open.
Note the date on the water filter. An overdue filter can starve the ice maker.
Look for ice fused into a solid block in the bin. Break it up or empty the bin, then wait a day.
On an undercounter machine, look for standing water in the bin or under the unit.

Our guide to an ice maker not making ice walks through these in more detail.

Is Sub-Zero ice maker repair worth it?

Living without ice from a Sub-Zero is rarely necessary. Most ice faults are contained repairs to the water valve, filter housing, fill tube, ice maker assembly, drain pump or dispenser parts. A failed sealed system in an undercounter ice machine is the one case where we will talk through the age of the unit with you before quoting.

How a repair visit works

Call or send a request
We reply within one business hour. We ask what the appliance is doing, the brand and, if handy, the model number from the label inside the door.
Diagnosis in your home
A technician tests the system and finds the actual fault. The visit is $149.
Written quote first
You get the price before any work starts. Go ahead and the $149 is credited toward the repair.
Repair with OEM parts
Common parts are often on the truck. If one has to be ordered, we book the return visit when it arrives. Parts and labor are covered by our warranty.

Frequently asked questions

How long does a Sub-Zero ice maker take to start making ice?

After a new installation or a repair, expect the first ice within roughly a day once the freezer is fully cold, and a full bin over the following day or two. The ice maker will not cycle until its mold is cold enough, so a freezer still pulling down will not make ice yet. If nothing appears after that, call us.

Should I throw out the first batches of ice?

It is a good habit after a new filter, a repair, or a period without use. The first cycles flush air and loose particles from the line and the filter. Discarding the first few batches costs nothing and avoids cloudy or off-tasting ice.

Does a Sub-Zero undercounter ice machine need regular cleaning?

It does. Minerals and biofilm build up on the ice-making surface and in the water path, slowing production and affecting taste. Follow the cleaning procedure in your owner's guide and use only the cleaner it calls for. Seattle-area city water is relatively soft, which helps, but homes on wells may see scale build faster.

Is it worth repairing the ice maker or just living without it?

On a built-in, fixing it is usually the sensible choice. Many ice maker faults trace to a water valve, filter, fill tube or ice maker assembly, all of them contained repairs that do not involve the sealed system. Leaving it broken also risks a leak if a valve sticks open.

Book Sub-Zero ice maker repair

Tell us what's going on and we'll call or text you within one business hour (Mon–Sun, 8 AM–8 PM) to set up a time. In a hurry? Call (206) 350-0055 or send a text.

Warm fridge? Let’s get it looked at.

We answer the phone Mon–Sun, 8 AM – 8 PM. Same-day visits are often possible when you call early.

Call (206) 350-0055 Request online