LG Refrigerator Ice Maker Not Working: Diagnosis & Repair Guide

Common Symptoms

• Ice maker has not produced ice in 24+ hours despite freezer at correct temperature
• Er IF error code on display — ice fan blocked by frost or fan motor failed
• Er IS error code — ice maker sensor fault, mold thermostat not sensing freeze temperature
• Er dH error code — defrost heater failing, frost accumulating on evaporator
• Ice Plus feature enabled but still no ice produced
• Ice in bin but dispenser will not release ice — auger motor or Hall effect sensor failure
• Loud rattling from ice dispenser area when ice release is attempted
• Freezer temperature fluctuating above 5°F intermittently

Most Likely Causes

1. 1

   Er IF — Frozen Fan Blade or Ice Evaporator Frost Buildup

   The Er IF error on LG refrigerators signals the ice maker fan is not running at the expected speed. The most common cause is frost accumulating around the fan motor housing in the ice maker compartment. When LG's defrost cycle runs infrequently or the defrost heater begins to fail, ice forms around the fan blades and blocks rotation. Diagnosis: remove the ice bin and visually inspect the back wall of the ice maker compartment for frost. If frost is present, thaw with a hair dryer on LOW heat for 5–10 minutes. If Er IF clears after thawing, the defrost system (Er dH) is the root cause. If Er IF returns without frost, the fan motor 4681JB1020A has mechanically failed.

2. 2

   Ice Plus Feature Not Activated — Fast Ice Cycle Not Running

   LG refrigerators include an Ice Plus (or Ice Maker Plus) feature that temporarily increases the compressor speed and fan cycle to accelerate ice production for up to 24 hours. If Ice Plus is available on your model and has not been activated after a recent warm period or after the ice bin was emptied, ice production may be slow rather than stopped. Activate Ice Plus by pressing the Ice Plus button on the control panel — it typically runs for 24 hours then automatically returns to normal mode. This is not a repair but a feature check that rules out user-setting issues before hardware diagnosis.

3. 3

   Water Inlet Valve AJU72992601 — Ice Maker Solenoid Open Circuit

   The LG water inlet valve (AJU72992601 on LRMVS3006S and related French door models) has a dedicated solenoid for the ice maker fill cycle, separate from the dispenser solenoid. A failed ice maker solenoid stops water from entering the mold during the fill phase. Symptom: the test cycle runs (motor turns, arm rotates) but no water fills the mold. Test: unplug the refrigerator, disconnect the ice maker solenoid connector at the valve, and measure resistance — 200–500Ω is normal; OL (open circuit) confirms failure. Also check water pressure (minimum 20 PSI) and the water filter condition before condemning the valve.

4. 4

   Linear Compressor Considerations — Temperature Stability Impact

   LG's linear compressor maintains tighter temperature bands than conventional single-speed compressors. An advantage most of the time, this can mask early defrost system failures — the compressor compensates for rising freezer temperature as frost builds, so the freezer display may read 0°F while the actual ice maker compartment temperature is significantly warmer. If ice production declines gradually over weeks rather than stopping abruptly, measure the actual freezer temperature with an appliance thermometer placed near the ice maker. A reading above 5°F with the display showing 0°F indicates a defrost system problem, not an ice maker failure.

5. 5

   Ice Maker Assembly AEQ73110224 Internal Failure

   The LG ice maker assembly AEQ73110224 contains the motor, mold, mold thermostat, and sensor as a sealed unit. When the assembly fails internally — most commonly the mold thermostat (Er IS) or motor — the test cycle either produces no arm movement, or the arm moves correctly and water fills the mold but ice never ejects. A failed mold thermostat prevents the control board from initiating the harvest cycle even when the mold is frozen solid. Full assembly replacement resolves all internal component failures in one repair.

Quick DIY Checks

1. 1Check that the ice maker is switched ON and verify Ice Plus: on LRMVS3006S and LRFXS2503S French door models, open the freezer and locate the ice maker On/Off button on the front face of the ice maker unit. Confirm it is in the ON position. Also check the control panel for any active error codes (Er IF, Er IS, Er dH) and record them before proceeding. If your LG model has an Ice Plus button, press it to activate the fast-ice cycle — this rules out a user-setting issue before any hardware diagnosis. On non-display models, the ice maker On/Off switch is the only user control.
2. 2Clear Er IF by inspecting for frost around the ice fan: if Er IF is displayed, remove the ice bin completely and use a flashlight to inspect the back wall of the ice maker compartment. Look for frost or ice buildup around the fan opening. If significant frost is present, use a hair dryer set to LOW heat to thaw the ice around the fan area (5–10 minutes). Place a towel on the freezer floor to catch melt water. After thawing, replace the ice bin and check if Er IF clears and ice production resumes. If it does, the defrost system (Er dH path) is the root cause — investigate the defrost heater.
3. 3Verify water supply and test the water inlet valve AJU72992601: pull the refrigerator from the wall and confirm the water shut-off valve is fully open. Run the water dispenser for 10 seconds — strong, steady flow confirms adequate supply pressure. If dispenser flow is weak, replace the water filter (change every 6 months). To test the valve: unplug the refrigerator, access it at the rear lower section, disconnect the ice maker solenoid connector, and measure resistance — 200–500Ω is good; OL confirms the solenoid coil has failed. AJU72992601 is approximately $30–50.

1. 4Run the LG ice maker test mode: with the ice bin removed, locate the Test button on the ice maker assembly (usually requires removing the ice bin first to access the face of the unit). Press and hold the Test button for approximately 3 seconds until the motor engages. Watch the harvest arm complete a full rotation, return to home position, then listen for water fill (gurgling sound 2–3 minutes in). Diagnostic results: motor runs + water fills = ice maker mechanism and inlet valve are functional; no water fill = inlet valve or supply pressure issue; no motor movement = ice maker assembly AEQ73110224 has failed.
2. 5Check freezer temperature accounting for linear compressor behavior: place an appliance thermometer in the freezer near the ice maker and check after 4 hours with doors closed. Target: 0°F (-18°C). LG linear compressors compensate for rising freezer temperature, so the display may show 0°F while actual ice maker compartment temperature is 5–10°F warmer due to frost buildup. A thermometer reading above 5°F with the display reading correctly points to defrost system failure (Er dH) causing heat soak in the ice maker section.
3. 6Inspect auger motor 4681EA2002H and Hall effect sensor 6501JB1006L if ice dispenser fails: if ice is present in the bin but the dispenser will not release ice, the failure is in the bin drive system. Press the dispenser paddle and listen — the auger motor should run within 1 second. If silent with a full bin, the auger motor has failed. If the motor stutters or starts and stops repeatedly, the Hall effect sensor is reporting a false jam. Rattling during dispense indicates clumped ice jamming the auger — remove the bin and break up clumps first before condemning any part.
4. 7Replace the ice maker assembly AEQ73110224 if the fill cycle runs but no ice forms: if the test mode confirms water enters the mold (you heard water filling) and the freezer temperature is confirmed at 0°F, but no ice ejects after 2–3 hours, the mold thermostat or internal sensor has failed — replace the assembly. To install: unplug the refrigerator, remove the ice bin, disconnect the wire harness, remove the 3–4 mounting screws, swap in the new AEQ73110224, reconnect the harness, reinstall the bin, and run a test cycle to confirm. Allow 24 hours for a full production assessment.

Repair vs Replace

Recommended Tools & Parts

• LG Water Inlet Valve AJU72992601

  OEM dual-solenoid water inlet valve for LG French door refrigerators including LRMVS3006S, LRFXS2503S, LRMVS3006D. Ice maker solenoid and dispenser solenoid both test at 200–500Ω when good. Located at rear lower section behind kick grille.

  $30–$50

  Buy on Amazon →

• LG Ice Maker Assembly AEQ73110224

  OEM replacement ice maker assembly for LG French door refrigerators. Complete unit includes motor, mold, thermostat, and sensor. Fixes Er IS faults and harvest cycle failures where water fills but ice never ejects.

  $80–$130

  Buy on Amazon →

• LG Auger Motor 4681EA2002H

  Replacement auger motor for LG ice bin dispenser. Replace when ice is present in the bin but the dispenser does not release ice and the motor is silent when the paddle is pressed.

  $40–$65

  Buy on Amazon →

• LG Hall Effect Sensor 6501JB1006L

  OEM Hall effect sensor for LG ice maker auger motor. Replace when auger motor stutters or stops repeatedly during dispense with no physical ice jam present.

  $20–$35

  Buy on Amazon →

• LG Ice Fan Motor 4681JB1020A

  OEM ice maker compartment fan motor for LG refrigerators. Replace when Er IF code persists after frost is cleared and fan blades spin freely by hand.

  $25–$45

  Buy on Amazon →

Links are Amazon affiliate links (tag: fixitfastai-20). Prices are estimates.

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