Sub-Zero refrigeration

Sub-Zero ice maker not making ice — Orange Park and Clay County

The most common call we take, and the one most often misdiagnosed. An ice maker that will not harvest is frequently reporting a fault somewhere else in the cabinet.

No ice and slow ice are different faults. The module is not always either of them.

An ice maker that has stopped is the call we take most often, and it almost always arrives with a theory already attached: the ice maker is broken and it needs a new one.

Sometimes that is right. More often the ice maker is the messenger rather than the fault. It is the most temperature-sensitive process in the cabinet, because it will not begin a harvest until the mold reaches its release temperature, so it is the first thing to visibly stop when something upstream of it drifts. Fitting a new assembly on suspicion buys a new part and the same symptom — which is why the compartment gets checked before the ice maker does.

Temperature comes before the ice maker

The freezer compartment gets checked before anything is opened up. An ice maker is a thermostatically triggered device: it will not begin a harvest until the mold reaches its release temperature. A compartment sitting a few degrees warmer than it should produces exactly the symptom described on the phone — the mold fills, the water freezes eventually, and nothing ever comes out of it.

That is not an ice-maker fault. It is a refrigeration fault that happens to show up in the ice first, because ice is the most temperature-sensitive thing the cabinet does. Replacing the ice maker in that situation buys you a new part and the same problem.

On a built-in with two sealed systems, the freezer side can be struggling while the fresh-food side reads perfectly normal, which is why so many people tell us “the fridge is fine, it is just the ice.” Often the fridge is fine. The other half of the machine is not.

Fill, freeze, harvest, drain

Once temperature is confirmed, the sequence has four stages and the cube itself tells you which one failed.

Fill. Hollow cubes, short cubes, or a mold that is only part full point at water delivery: a partially closed shut-off behind the cabinet, a filter that was last changed several years ago, a kinked line pushed against the wall when the unit was slid back in, or a fill valve that is opening but not passing its rated flow. We check pressure at the shut-off as well as at the appliance, because a restriction upstream reads the same as a failed valve if you only measure in one place.

Freeze. Cubes that are cloudy or take far too long point back at compartment temperature and, behind that, at airflow.

Harvest. A full, properly frozen mold that never ejects is a mold heater or ejector problem. This is the one stage where the ice maker itself is genuinely at fault, and it is a smaller share of these calls than most people expect.

Drain. A solid slab in the bin is not an ice-maker failure at all. It is melt-and-refreeze, and it means something is warming the bin between cycles — usually a defrost or drain issue, sometimes a door that is not sealing.

The condenser question

Before we leave, the condenser gets looked at whatever the fault turns out to be. In a house with dogs, cats, or an air handler running nine months of the year, the condenser behind the upper grille collects a felt of hair and dust that it was never designed to breathe through. The unit compensates quietly for months. Then it stops compensating, and the ice is the first thing you notice.

When the assembly really is the answer

There is a version of this call where the ice maker itself is genuinely at fault, and it is worth describing so the estimate makes sense when you see it. A mold that fills correctly, freezes to a proper cube in a compartment we have measured and confirmed, and then never ejects has a harvest problem: the mold heater, the ejector mechanism, or the switch that tells the control the cycle finished.

That is a bounded repair on a discrete part, and it is the one situation where replacing the assembly is the cheapest correct answer rather than a guess. The part is ordered against the model and serial from the plate inside the cabinet, because components are revised within a model designation and two units that look identical in a kitchen can take different assemblies. Common wear items ride on the van; an assembly ordered to a serial number adds days rather than hours, and we tell you which of the two you are in before you commit.

One honest limit: if the supply into the house is the problem — a failed shut-off, house plumbing, or a filter housing that is not ours — we will say so and stop there rather than working outside what we are competent to touch.

What a visit costs

A flat diagnostic fee covers the visit and is credited toward the repair if you go ahead with it. You get a written figure before any part is ordered, and nothing is ordered until you approve it. Refrigerant work is handled by EPA Section 608 certified technicians. Parts are genuine OEM.

What people describe

The mold fills but the cubes never release
Cubes come out hollow, cloudy or half the normal size
Ice production drops off over weeks rather than stopping all at once
The bin has a solid slab in it instead of loose cubes
No water reaches the mold at all
Ice tastes of the freezer, or of nothing but old plastic

How the visit runs

Confirm the freezer compartment is actually holding temperature before touching the ice maker
Check the fill valve and the supply line for restriction or a closed shut-off
Read the mold heater and the ejector cycle rather than replacing the whole assembly on suspicion
Inspect the condenser for pet hair and dust loading, which changes everything downstream
Look at the drain and defrost path for melt-and-refreeze evidence in the bin
Check the filter age and the line pressure at the shut-off, not just at the appliance

Typically 60–90 minutes for most units.

Parts, access and what we will not take on

Parts are matched to the serial, not the model

Built-in refrigeration runs long production lives, and components are revised inside a model designation. That is why we take the model and serial from the plate inside the cabinet before anything is ordered: two units that look identical in a kitchen can take different boards, different gaskets and different fan assemblies. Genuine OEM parts only, so the part carries the manufacturer's own coverage rather than an aftermarket substitute.

What rides on the van, and what does not

Common wear items — seals, sensors, fans, drain components — are stocked, which is why a narrow scope produces single-visit repairs more often than a broad one does. Controls and sealed-system parts are ordered against your serial number and add days rather than hours. We tell you which of the two you are in at the first visit, not afterwards.

Access is part of the job

A built-in is framed into cabinetry. Working on one means grille clearance at the top, room at the hinge side, and sometimes drawing the unit out of its opening on its own rails — which is heavy work in a finished kitchen with a stone counter above it and hardwood below. If the fault is likely to need the unit out, we would rather plan the route with you than discover it on the day.

Where we stop

We work Sub-Zero built-in and integrated refrigeration and nothing else — no cooking equipment, no dishwashers, no other brands. If a fault turns out to be cabinetry, plumbing or house wiring, we say so and put it in writing rather than working outside our competence. Questions about a unit still inside the manufacturer's own coverage, a recall, or product registration belong with the manufacturer directly.

$129 flat diagnostic, credited toward the repair. Written estimate before any work starts. No parts ordered until you approve the figure.

Where we take this call

Customer reviews

Owners who called about this

Chosen for this page because they describe the same fault, and printed in full.

4.44.4 out of 5 across all 21 reviews published on this site

5 out of 5
No ice for a fortnight. He found the shutoff arm out of adjustment and the water valve barely opening on our well pressure. He corrected both and left me knowing what to check before calling anyone again.
Barnabas W.March 2026
4 out of 5
Ice production had dropped to almost nothing over a few months. He measured the water pressure at the unit, found it low, and traced it to a filter housing nobody had ever changed. Simple once he explained it.
Reginald H.December 2025
3 out of 5
He worked out why we had no ice and the repair has held, but the part sat on order for a fortnight and I had to chase for an update. The technician was fine; the communication in between was not.
Gideon M.June 2026

All 21 of them, three-star entries included, are on what owners said after the visit.

Book a diagnostic visit

One flat fee to find out what is actually wrong, credited toward the repair. We cover Orange Park and the rest of Clay County within about 40 miles.

Call (904) 442-8210 Request a visit

Diagnostic: $129
Labour warranty: 90 days
Parts warranty: 365 days
Monday – Friday: 08:00 – 18:00
Saturday: 09:00 – 16:00

Written estimate before any work starts. No parts ordered until you approve the figure. Closed Sunday. Calls placed after hours are returned the next working morning.