LG Ice Maker: No Ice, Thin Ice or Frozen Blocks?

When an LG refrigerator stops making ice, the water filter is the first thing to check — more so than on most brands. LG ice makers are sensitive to water flow, and an overdue filter, or a cheap aftermarket one, restricts the fill enough to leave you with thin, hollow, or no cubes. After the filter come the usual suspects: the water supply and line, whether the freezer is actually cold enough, and finally the inlet valve or the ice-maker assembly. Start with the filter and work outward, and most LG ice problems resolve without a technician.

Quick answer#

Change the water filter for a genuine LG part and give it a full day — a restricted filter is the leading LG ice cause, and a cheap aftermarket one restricts even when new. Confirm the supply valve is fully open, the line is not kinked or frozen, and the freezer is cold enough to freeze a whole harvest.

Then, before you wait another day, force a cycle with the ice maker's test button and watch what happens. That single test splits the entire problem in half: water arriving at a cold mold and water never arriving are two different repairs, and so are a mold that fills and never dumps and one that dumps and never refills. The table below reads those outcomes — together with what is actually in the bin — back to a cause.

What is the ice maker actually producing?#

Look at two things: what is in the bin, and what the mold does when you hold the test button. Between them they separate a supply problem from a temperature problem from a harvest problem, and those three go to different places.

The second and fifth rows are the two that save the most time, because both of them retire the entire water side of the diagnosis in one observation.

Where these rows come from: the four causes ranked in the table further down this page — filter, supply and fill tube, freezer temperature, inlet valve — plus the two splits the page already makes but does not cross: the test-button outcome, where a motor that cycles without water points upstream and water without a dump points at the assembly, and the two-ice-maker case where one working unit proves the supply. They are keyed on what is visible in the bin and the mold rather than on the part, because that is what a homeowner has. No row repeats a share, and this page states no measured incidence for the harvest or two-maker cases at all.

Start with the water filter#

This is the LG-specific first move. The filter restricts flow as it clogs, and LG's ice makers need a strong, full fill to form proper cubes. Two filter problems dominate:

• Overdue filter: a filter past its interval clogs and starves the fill. Replace it on schedule (typically every six months).
• Aftermarket filter: many non-genuine filters flow poorly and restrict the ice maker even when new. Use a genuine LT1000P or LT700P; swapping a cheap filter for a real one fixes a lot of "broken" LG ice makers.

After changing the filter, purge several glasses through the dispenser to clear air, then wait 24 hours before judging.

Water supply and line#

1. Confirm the supply valve behind or under the fridge is fully open, not cracked a quarter turn.
2. Check the line for a kink where the fridge sits close to the wall.
3. Look for a frozen fill tube at the ice maker — a common LG issue that blocks water entirely. Thaw it to restore fill; if it refreezes, the freezer may be running too cold or the fill-tube area needs attention.

Is the freezer cold enough?#

An ice maker needs the freezer near zero degrees Fahrenheit to freeze a full harvest. If the freezer is warm — from a door seal leak, blocked vents, or a cooling fault — cubes come out thin, hollow, or not at all. Confirm the freezer temperature before blaming the ice maker; a warm freezer is a common overlooked cause, and no ice maker works in one.

Run the test cycle#

Most LG ice makers have a test button on the unit. Press and hold it to force a fill-and-harvest: the motor should cycle, water should enter, and the ice should dump. This tells you which side is at fault — if the motor cycles but no water enters, the problem is the filter, line, or valve; if water enters but the mold never empties, the ice-maker assembly or its harvest mechanism has failed. It saves waiting hours to see a result.

Causes by likelihood#

The remaining cases are the ice-maker assembly itself, replaced when water and temperature are confirmed good.

Read that column as a ranking of these four causes against one another on an LG that has stopped making ice, not as an incidence rate: this guide names no sample, period or model population behind the figures, and they are stated to set the order you check things in rather than to be quoted. The shares are also why the filter comes first — not because it is the most likely to have failed, but because it is the cheapest thing on the list to eliminate.

The inlet valve and ice-maker assembly#

If the filter is fresh, the supply is open, the line is clear, and the freezer is cold but you still get no ice, the water inlet valve or the ice-maker assembly is the fault. A valve that gets its signal but does not open has failed internally and is replaced with the water off. An assembly that fills but never harvests, or harvests but never refills, has an internal fault. Both are modest parts and a technician diagnosis.

LG ice-maker types matter#

LG uses more than one ice-maker arrangement, and knowing yours narrows the diagnosis. Many LG french-door models put the ice maker in the door, fed by a fill tube that runs across the hinge — a design more prone to a frozen or pinched fill line than a freezer-mounted maker. Some LG models add a second ice maker in the freezer drawer (the rounded "Craft Ice" maker), so one can fail while the other works, which by itself tells you the water supply is fine and the fault is in the failed unit. Confirm which maker is not producing before you chase a whole-fridge water problem — if one works and one does not, the supply is not your issue.

Reading the ice you are getting#

What comes out of an LG ice maker is diagnostic. No ice and a dry mold means no water is arriving — filter, line, frozen tube, or valve. Thin, small, or hollow cubes mean water arrives but the fill is weak (a restricting filter, low pressure) or the freezer is not cold enough. Cubes that form but never drop point at the harvest mechanism in the assembly. Because LG ice makers are so flow-sensitive, thin and hollow cubes point back at the filter more often on LG than on other brands — which is why the filter is the first thing to change.

The LG linear compressor and cold#

Many LG refrigerators use an inverter linear compressor that modulates its output. That efficiency is a strength, but it also means the freezer must actually be reaching and holding near zero degrees Fahrenheit for the ice maker to work — a cooling fault that leaves the freezer a few degrees warm will quietly starve ice production even though the fridge seems "cold." If the ice is poor and you also notice the freezer is not as cold as it should be, treat the cooling as the root cause and the ice maker as a symptom, not a separate failure.

Which causes need a technician#

Which causes need a technician#

• Water inlet valve: tested for signal and flow, replaced with the water off.
• Ice-maker assembly: replaced when fill and freezer temperature are confirmed good.
• Underlying cooling fault keeping the freezer warm.

The filter, supply, and thaw checks are yours; the valve and assembly are technician parts.

Cleaning and resetting the ice maker#

If the ice maker fills and freezes but production is sluggish or the cubes clump, a cleaning and reset often helps before any part is considered. Empty the bin, wipe it out, and clear any old or fused ice that is jamming the mechanism or the ejector. Then reset the ice maker with its test button or by cutting fridge power for a few minutes so the control restarts a clean cycle. Clumped or fused cubes are frequently a sign the ice sat unused and partially melted and refroze, rather than a fault — clearing the bin and letting it make a fresh batch resolves it.

When ice stopped after something changed#

Pin down what changed just before the ice stopped, because it usually names the cause. Stopped right after a filter change points at air in the line or an ill-fitting or aftermarket filter — purge and confirm a genuine LT1000P or LT700P. Stopped after the fridge was moved or the water reconnected points at the supply valve not fully reopened or a kinked line. Stopped after a power outage points at a control that needs a reset and time to recover. Stopped with no change at all, gradually, points more at a slowly clogging filter or a developing valve or cooling fault. That timeline is one of the most useful things you can note.

How long to wait for ice#

After any fix, an LG ice maker takes several hours for the first harvest and up to 24 hours to fill the bin normally. Do not judge it in the first hour. If there is no ice after a day with water confirmed reaching a cold mold, the assembly is the next step.

Preventing ice-maker problems#

• Use genuine LG filters (LT1000P or LT700P) and change them on schedule.
• Keep the freezer near zero degrees and the door sealing fully.
• After a filter change, purge the line and allow 24 hours for ice to recover.
• Keep the supply valve fully open and the line unkinked behind the fridge.

Frequently Asked Questions#

Why is my LG refrigerator not making ice?#

On LG the first suspect is the water filter — an overdue filter or a non-genuine one restricts flow enough to starve the ice maker. After that, check the water supply and line, whether the freezer is cold enough, and finally the inlet valve or the ice-maker assembly.

Does the LG water filter affect ice making?#

Very much. LG ice makers are sensitive to flow, and a clogged or aftermarket filter that restricts water leaves you with thin, hollow, or no cubes. Use a genuine LT1000P or LT700P filter and change it on schedule — this alone fixes many LG ice complaints.

How do I reset an LG ice maker?#

Many LG ice makers have a test button on the front of the unit; press and hold it to force a fill-and-harvest cycle. Watch whether water enters and whether it dumps the ice. Cutting fridge power for a few minutes also resets a stuck ice-maker control.

Is an LG refrigerator not making ice worth repairing?#

Yes — most fixes are cheap (a filter, opening the supply, thawing a line). Even an inlet valve or ice-maker assembly is a modest part on a fridge under about ten years old, well worth it versus replacement.

I changed the LG water filter and still have no ice after 24 hours. What next?#

Stop waiting and force a cycle with the test button, because the next thing you need is an answer rather than another day. If the motor cycles and no water enters the mold, the filter was not the whole story and the problem is still upstream — the supply valve, a kink in the line, or a fill tube that has frozen, which is a known weak point on door-mounted makers where the tube crosses the hinge. If water does enter, the water side is proven and the question moves to whether the freezer is cold enough to freeze a full harvest, or whether the assembly can dump what it makes.