IceMachineRepair.center (844) 410-9163Mon–Sat, 8am–8pm Book a visit
The evaporator plate inside an open modular ice machine with a full sheet of clear cubes still frozen to it, the ice machine's plastic water curtain hanging just in front.

Sub-Zero ice machine with the blue ICE light flashing: automatic shut-off

The UC-15I stops itself after two freeze and harvest cycles in a row that each reach the 55-minute maximum, or after about 120 cycles, roughly two days, that never satisfy the bin.

(844) 410-9163

Mon–Sat, 8am–8pm

  • Harvest and freeze cycle
  • Ice machine harvest repair
  • Source: Sub-Zero

Book a visit

Three short steps, about a minute.

or call (844) 410-9163

What ICE flashing
actually means.

The UC-15I stops itself after two freeze and harvest cycles in a row that each reach the 55-minute maximum, or after about 120 cycles, roughly two days, that never satisfy the bin. The steady blue ICE light then flashes. Sub-Zero's own steps start with the water, because a machine that gets too little water cannot finish a cycle.

Sub-Zero ice machine display · also shown as ICE light flashing blue, blinking ICE LED

What to do when ICE flashing shows on the ice machine

Kind of codeHarvest and freeze cycle

A freeze ran longer than the board allows, or a harvest started and the ice never fell. Scale on the evaporator holds the sheet to the plate, a thickness probe crusted with minerals never signals, a hot gas valve that does not open leaves the plate cold, a harvest assist that does not push, or a water curtain that swings without tripping its switch all end in this family. A cleaning cycle run by the manual often clears it; a valve or a probe is a technician's job.

Usually leads toIce machine harvest repair

The hot gas valve, harvest assist, curtain switch and thickness probe that decide when a sheet of cubes is done and make it drop.

Shows up asIce Machine Error Code or Flashing Light: What It Is Telling You

An ice machine error code may show as a number on a small display, a pattern of blinking lights on the control board, a colored light on the front, or a machine that stops with one indicator flashing.

MakeSub-Zero

Sub-Zero ice machine calls in a home check the drain route and the water line with the same care as the ice itself.

SourceSub-Zero answer: UC-15I not running with ICE indicator flashing

Sub-Zero UC-15I and UC-15IP, indoor and outdoor, with the POWER, ICE, DELAY, CLEAN and REPLACE FILTER touch panel. The Designer DEU1550I guide could not be read, so it is not covered.

Before you book,
in this order.

Each step comes from Sub-Zero's own guidance for ICE flashing on its ice machines. Follow it to the end: the last card says whether this is a visit.

01

Find the water shut-off for the ice machine, behind the kickplate, in a nearby cabinet or in the basement, and make sure it is fully open.

02

After the water is back on, allow up to an hour for the first harvest; Sub-Zero expects one or two batches in that time.

03

With a filter installed, remove it for a trial run; more water gets through without it, and if ice returns the filter was the problem.

04

If the machine still makes no ice, book a visit.

Still there?

It usually turns into ice machine harvest repair. Book with the code and the model number.

What not to do

A steady blue ICE light is normal and simply means the machine is making ice. The flashing CLEAN light belongs to the cleaning cycle and has nothing to do with this shut-off.

What you may
notice with it.

The ice machine problems ICE flashing tends to arrive with. Answer these at the ice machine before anyone is booked.

All problems

Before you call

Ice Machine Error Code or Flashing Light: What It Is Telling You

All 7 causes, cheapest first

It also comes with

Close view of the small dark control panel on the front of a stainless modular ice machine head, one abstract indicator light glowing amber and a few plain unlit dots beside it, the edge of the ice machine's clear water curtain visible through a narrow window below. Problem

Ice Machine Error Code or Flashing Light: What It Is Telling You

7 causes, cheapest first

Where ICE flashing usually leads

Ice machine harvest repair.

Thickness probe, curtain switch, harvest assist and hot gas valve · low to moderate.
Book a visit What the job involves

Sub-Zero
ice machines.

Sub-Zero ice machine calls in a home check the drain route and the water line with the same care as the ice itself.

Sub-Zero ice machine repair

More Sub-Zero codes

CLEAN flashingREPLACE FILTER

Harvest and freeze cycle on other makes

Atosa E2Blue Air E1Follett HI AMPSHoshizaki 1 beepIce-O-Matic Error 1Koolaire SL#1Manitowoc E01Scotsman 1
All 26 codes of this kind
A stainless undercounter ice machine built in under a dark stone bar top in a hotel bar, the ice machine door swung open to show a bin full of clear square ice cubes with a plain stainless scoop resting in them, clean glassware on the counter above, soft warm light. Sub-Zero builds this

Undercounter ice machine

A self-contained ice machine that makes and stores its own ice under a bar, a service counter or a kitchen island, from commercial units to clear-ice models in large homes.

In Sub-Zero's own words

UC-15I Undercounter Ice Makers have an automatic shut-off mode that turns the unit off after one of the following occurs
Sub-Zero answer: UC-15I not running with ICE indicator flashing Sub-Zero answer: UC-15I not running with ICE indicator flashing Sub-Zero answer: UC-15I not running with ICE indicator flashing Sub-Zero UC-15I undercounter ice machine use and care guide

Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Sub-Zero UC-15I and UC-15IP, indoor and outdoor, with the POWER, ICE, DELAY, CLEAN and REPLACE FILTER touch panel. The Designer DEU1550I guide could not be read, so it is not covered.

Sub-Zero ICE flashing ice machine repair,
where we come out.

The same visit in every metro below: the code, the model number, and a diagnosis before any part is ordered.

All service areas

Tampa BayFL · 31 areas

OrlandoFL · 30 areas

Miami / South FloridaFL · 47 areas

New York MetroNY · 75 areas

HoustonTX · 36 areas

ChicagoIL · 50 areas

Los AngelesCA · 95 areas

San DiegoCA · 31 areas

San Francisco Bay AreaCA · 74 areas

A family filling glasses with nugget ice from an ice machine in a large home kitchen.
For the heart of your home.

Questions
about ICE flashing.

Can I clear ICE flashing myself?
Find the water shut-off for the ice machine, behind the kickplate, in a nearby cabinet or in the basement, and make sure it is fully open. If it comes back, it needs a visit.
How do I reset a Sub-Zero ice machine with the ICE light flashing?
Fix the reason it stopped first: open the water, then give it an hour. Sub-Zero also suggests running it briefly without the filter to see whether flow was the problem.
Can a clogged filter make my Sub-Zero ICE light flash?
Yes. A restricted filter slows the water, cycles run long and the machine shuts itself off. The REPLACE FILTER light comes on after 8,000 cycles, but a filter can clog sooner on poor water.
My Sub-Zero ice machine ran for two days and then the ICE light started flashing. Why?
The second shut-off condition is about 120 cycles that never fill the bin. Very warm surroundings melt the unrefrigerated bin as fast as it fills, or the bin thermostat may not be sensing the ice, so book a visit if the room is normal.

Back to your everyday

Still showing ICE flashing?

A booking with a code goes further when it carries the light or code copied as it appeared, the model and serial off the data plate, and a word on whether cubes still fall into the bin. With those three in hand, our office can match the probable part to your machine the same afternoon.

Schedule a repair Call (844) 410-9163
(844) 410-9163 Schedule a repair