Quick Answer: Before assuming a part has failed, confirm the freezer temperature — LG’s own support pages say it needs to be at 0°F or colder for the ice maker to run, and a warmer freezer is the most overlooked cause of an LG fridge that stops making ice. Next, check that the ice maker’s on/off switch hasn’t been bumped, that the water supply valve is fully open with no kinked line, and that the water filter isn’t overdue — LG specs most cartridges for 6 months, and filter problems past that point aren’t covered under warranty. One thing worth knowing up front: per a repair company’s own tally of CPSC SaferProducts.gov reports, LG’s ice maker is named in 24 of 192 refrigerator safety complaints (about 13%) filed since 2011 — the most-cited part, but there’s no CPSC recall tied to it. LG’s actual documented reliability exposure is a linear-compressor lawsuit history, not an ice-maker recall, and that’s a different failure entirely — one that takes down the whole fridge, not just the ice.
This guide covers LG’s standard built-in cube ice maker — the one running off your water line and the freezer compartment’s own cooling. It’s a different mechanism than LG’s Craft Ice compartment, which makes clear ice spheres for drinks and has its own well-documented complaint history covered in our best refrigerator with a nugget ice maker guide. If your symptom is specifically a Craft Ice tray freezing solid or leaking rather than the main ice maker producing nothing, that’s the guide you want instead.
Diagnose your symptom
| What you see | Most likely cause | Fix |
|---|---|---|
| No ice, freezer feels warm or inconsistent | Freezer above LG's 0°F minimum | Lower freezer setpoint, recheck after 24 hours |
| No ice, freezer temp confirmed fine | Water supply valve closed or kinked line | Fully open the saddle valve behind the fridge, straighten the line |
| Ice volume dropped noticeably over weeks | Filter overdue (LG specs ~6 months) | Replace with an LG-approved filter; test by dispensing with it removed |
| Unit sits idle despite room in the bin | On/off switch bumped off | Flip the switch back on, check for a stored error via LG ThinQ |
| Brand-new install, no ice yet | Normal startup delay | Wait up to 2 days per LG's own guidance before troubleshooting further |
| Whole fridge feels warm, not just the ice bin | Possible compressor failure | Call a technician — this isn't a filter or valve issue |
1. Check the freezer temperature first
This is the step most owners skip. LG’s own refrigerator support documentation specifies the freezer needs to be at 0°F or colder before features like Express Freeze or Ice Plus will even engage, and the standard ice maker needs a similarly cold compartment to cycle normally. A freezer running warmer — from a door left ajar, a recent large grocery load, or a setpoint nudged during cleaning — can quietly stall ice production without any other visible symptom. Lower the setpoint if needed and give it a full 24 hours before moving on to the next step.
LG Refrigerator Ice Maker Assembly (Kit)
- LG uses several different kit numbers across its French-door, side-by-side, and InstaView lineups — confirm yours against your model's parts diagram before buying.
- Covers swap-outs for a failed factory module, not add-on installs.
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2. Confirm the water supply is actually open
A restricted or fully closed water supply line is one of the most frequently cited causes of this exact symptom across appliance-repair guides. Check the saddle valve or shutoff fitting behind the refrigerator — it needs to be turned fully open, not just cracked — and trace the line for kinks, especially if the fridge was recently pulled out and pushed back against a wall. A pinched line can restrict flow enough to starve the ice maker even though water technically reaches it, and low line pressure specifically can leave the dispenser working (just slower) while the ice maker gets nothing.
3. Rule out the water filter
If ice output has been gradually declining rather than stopping all at once, the water filter is the next suspect. LG recommends replacing most of its refrigerator filter cartridges roughly every 6 months, sooner with hard water or if flow has already noticeably dropped — and LG is explicit that problems caused by a filter kept past that window aren’t covered under warranty. A filter that’s overdue, clogged, or seated incorrectly during the last swap can restrict flow enough to choke off ice production while the water dispenser keeps working normally. After replacing it, dispense water for a minute first to clear trapped air from the line before expecting normal ice output.
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4. Check the switch, clumped ice, and new-install delays
Most LG ice makers have an on/off switch that’s easy to bump while loading groceries — confirm it’s actually on before assuming a failure. Next, check for ice clumped into a solid mass inside the bin from partial melting and refreezing, often caused by a door left slightly ajar; a stuck clump can block the auger and read as “not working” even though the maker itself is fine. If this is a brand-new installation, LG’s own guidance says to expect up to two days before ice production starts — don’t start troubleshooting a unit that just hasn’t had time to get cold yet.
5. Try a reset before assuming a parts failure
Third-party repair guides describe a reset sequence of flipping the on/off switch to off for about 30 seconds, back on, then pressing the ice maker module’s test button — the ejector motor should engage within a few seconds if the module itself is still functional. LG’s help library doesn’t publish this exact sequence for every model, so check your manual first if you have one. Some LG refrigerators also support diagnostics through the LG ThinQ app, which can surface a stored error code before you start swapping parts. If none of that produces any motor movement at all, the module itself has likely failed and is the next thing to replace — match the exact kit number to your model first.
6. When it’s not the ice maker at all — the compressor angle
Here’s something worth knowing before you order a part: LG’s most significant documented refrigerator reliability issue isn’t the ice maker module, it’s the linear compressor that cools the entire unit. LG settled a class-action lawsuit in 2020 covering certain refrigerator models bought between January 2014 and December 2017, offering an extended compressor warranty plus reimbursement for documented prior repairs — but that settlement’s claims deadline closed in January 2021, so it isn’t an option for a unit failing today. A newer suit, filed around 2024 and covering refrigerators with linear compressors bought from 2018 onward, was still being contested in court as of our research, with no confirmed open claims process. The reason this matters here: a failing compressor doesn’t just stop ice — it stops the whole fridge from cooling properly, which can look like “the ice maker stopped” if you haven’t also noticed the fridge section running warm. If your freezer temperature, water supply, filter, and switch all check out fine and the ice maker still does nothing while the rest of the fridge also feels off, that’s the point to call a technician rather than keep ordering ice-maker-specific parts. This is a different pattern than our Frigidaire and Whirlpool not-working guides, which both document real, ice-maker-specific CPSC recalls rather than a whole-appliance compressor issue.
The bottom line
Work through freezer temperature, water supply, filter, and the on/off switch in that order before assuming a part has failed — together they account for the large majority of “not working” cases, and a brand-new install just needs up to two days before it’s fair to troubleshoot at all. If everything checks out and the ice maker still does nothing, test the reset sequence and the module’s test button next. But if the whole refrigerator feels warm rather than just the ice bin being empty, don’t keep chasing an ice-maker-specific fix — that symptom pattern lines up with LG’s documented linear-compressor reliability history, and it’s worth a technician call rather than another part order. For the separate Craft Ice ice-sphere compartment instead of the standard ice maker, see our best refrigerator with a nugget ice maker guide.