LG Ice Maker Not Working: Diagnostic Guide & Fix

Common Symptoms

• Ice maker has not produced ice in 24+ hours with freezer temperature at set point
• Er IF error displayed — ice fan blocked or failed, often due to frost accumulation
• Er IS error displayed — ice maker sensor fault, mold thermostat or sensor has failed
• Er dH error displayed — defrost heater failing, frost building on evaporator
• IS error code on LG display — ice maker sensor in continuous fault
• Ice in bin but dispenser will not release ice — auger motor or Hall effect sensor failure
• Loud rattling from ice dispenser when ice release is attempted
• Freezer temperature fluctuating above 5°F due to linear compressor issues

Most Likely Causes

1. 1

   Er IF — Ice Fan Blocked by Frost, Fan Motor 4681JB1020A Failure

   The Er IF error on LG refrigerators indicates the ice fan (ice maker evaporator fan) is not running at the expected speed. The most common cause is frost accumulation around the fan motor housing — when the defrost system runs infrequently or a partial defrost heater failure allows frost to build up, ice forms around the fan blades and blocks rotation. Er IF is one of the most common LG ice maker error codes. Diagnosis: remove the ice bin and visually inspect the back wall of the ice maker compartment for frost buildup. If frost is present, thaw it with a hair dryer on LOW (5–10 minutes) and clear the fan area. If the error clears after thawing and the ice maker resumes normal operation, the defrost system (Er dH) is the root cause. If Er IF returns without frost, the fan motor 4681JB1020A has failed mechanically.

2. 2

   Er IS / IS Error — Ice Maker Sensor or Mold Thermostat Fault

   The Er IS error indicates the ice maker sensor (thermistor) is reading outside normal parameters. The sensor monitors ice mold temperature to determine when ice has frozen solid and is ready for ejection. A failed sensor prevents the control board from initiating the harvest cycle — water fills the mold correctly, but the ice never ejects, and the mold eventually overflows or freezes solid. The Er IS fault can also trigger if the sensor connector is loose or corroded; inspect the connector at the ice maker harness before condemning the sensor. The sensor is part of the ice maker assembly AEQ73110224 on most LG models and is not sold separately — assembly replacement is typically required.

3. 3

   Water Inlet Valve AJU72992601 Failure — No Fill During Test Cycle

   The LG water inlet valve (AJU72992601 on LRMVS3006S and related models) is a dual-solenoid valve — one solenoid for the ice maker water fill, one for the door water dispenser. A failed ice maker solenoid stops water from entering the ice mold during the fill phase of the harvest cycle. Test: unplug the refrigerator, access the valve at the rear lower section, disconnect the connector, and measure the ice maker solenoid coil resistance — 200–500Ω is normal; OL (open circuit) confirms failure. Also check water pressure at the supply line — minimum 20 PSI required. Verify the water filter is not overdue. AJU72992601 is approximately $30–50 and is a common LG service replacement.

4. 4

   Ice Maker Assembly AEQ73110224 Failure — Motor or Internal Component

   The ice maker assembly AEQ73110224 is LG's complete ice maker module for LRMVS3006S, LRFXS2503S, and LRMVS3006D models. It contains the motor, mold, thermostat, and sensor as a sealed unit. Internal failures include: motor failure (harvest arm does not rotate during test cycle), mold thermostat failure (mold temperature not sensed correctly, triggering Er IS), and sensor failure. If the test cycle runs with water filling but no ice ejects after 2–3 hours, and the freezer temperature is confirmed at 0°F, the assembly has failed internally. The AEQ73110224 is LG's standard replacement kit and resolves all internal ice maker component failures in one repair.

5. 5

   Auger Motor 4681EA2002H or Hall Effect Sensor 6501JB1006L — Dispenser Failure

   When ice is visibly present in the bin but the dispenser will not release ice, the failure is in the ice bin drive system — not ice production itself. The auger motor (4681EA2002H) drives the auger screw that pushes ice from the bin into the dispenser chute. The Hall effect sensor (6501JB1006L) monitors auger rotation speed and reports jams to the control board. A failed Hall sensor can cause the board to stop the auger motor after detecting a false jam signal. Test: press the ice dispenser paddle and listen — the auger motor should run within 1 second. If the motor is silent with a full bin, the motor has failed. If the motor runs briefly then stops and repeats (stutter), the Hall sensor is the issue. Rattling during dispense indicates a jammed auger from clumped ice.

6. 6

   Er dH — Defrost Heater Failing, Frost on Evaporator Causing Temp Fluctuation

   The Er dH error on LG refrigerators indicates the defrost heater circuit is not performing a complete defrost cycle. As frost accumulates on the evaporator coil, airflow to the ice maker compartment is progressively restricted, causing ice maker temperatures to rise above the production threshold. Unlike Samsung models, LG's linear compressor will continue running at variable speed trying to compensate — the result is a gradual decline in ice production rather than a sudden stop. Er dH is confirmed by: manual defrost restores ice production temporarily, but frost returns within 5–10 days. Repair requires replacing the defrost heater assembly and/or the defrost thermostat. See /fixes/lg-refrigerator-not-cooling for complete defrost system diagnosis.

Quick DIY Checks

1. 1Confirm the ice maker is switched ON: on LRMVS3006S and LRFXS2503S French door models, locate the ice maker On/Off button on the front face of the ice maker unit (usually inside the upper left freezer compartment or freezer door). Press it to confirm the ON position — an indicator light or the display panel will confirm status. On models with a wire shutoff arm, ensure the arm is in the DOWN (run) position. Also check the LG refrigerator display panel for any active error codes (Er IF, Er IS, Er dH, IS) — record any codes before proceeding. On non-display models, the only indicator is whether the ice maker test cycle responds.
2. 2Clear Er IF — check for frost around the ice fan: if Er IF is displayed, remove the ice bin completely and inspect the back wall and lower area of the ice maker compartment with a flashlight. Look for frost or ice accumulation around the fan opening. If significant frost is present, use a hair dryer on LOW heat to thaw the ice around the fan area (5–10 minutes). Place a towel to catch water. After thawing, replace the ice bin and check if the Er IF code clears — if it does and the ice maker resumes operation, the defrost system is the root cause (see Er dH step). If the fan area is frost-free but Er IF persists, the fan motor 4681JB1020A has failed and must be replaced.
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, check the water filter (replace if overdue or older than 6 months). To test the inlet valve: unplug the refrigerator, access the valve at the rear lower section, and disconnect the ice maker solenoid connector. Set multimeter to resistance mode and measure across the solenoid terminals — 200–500Ω is good; OL confirms the solenoid coil is open and the valve must be replaced. AJU72992601 is approximately $30–50.

1. 4Run the LG ice maker test cycle: locate the Test button on the ice maker assembly (usually requires removing the ice bin first). Press and hold the Test button for approximately 3 seconds until the motor engages and begins rotating. Watch the harvest arm complete a full rotation ejecting any ice, return to home position, then listen for the water fill (gurgling sound 2–3 minutes in). If the motor rotates and you hear water fill, the ice maker mechanism and inlet valve are functioning — monitor the freezer temperature (it must be at 0°F) and wait 2–3 hours for the first batch. If no water fill is heard, the inlet valve or supply pressure is the issue. If no motor movement occurs, the ice maker assembly AEQ73110224 has failed.
2. 5Check freezer temperature — LG linear compressor diagnosis: verify freezer temperature with an appliance thermometer — it should read 0°F (-18°C) after 4 hours with doors closed. LG's linear compressor maintains tighter temperature bands than conventional compressors; if the freezer is 5–10°F or warmer, the compressor or sealed system may have an issue separate from the ice maker. Er dH code with temperature above 5°F confirms defrost heater failure causing heat soak. On LRMVS3006S and LRMVS3006D (CRAFT ICE models), the dual evaporator system means the ice maker compartment has its own evaporator — confirmed frost on that evaporator points to the dedicated defrost circuit for the ice maker section.
3. 6Inspect auger motor and Hall effect sensor if ice produces but won't dispense: open the freezer and confirm ice is present in the bin. Press the ice dispenser paddle and listen: you should hear the auger motor run within 1 second of pressing. If completely silent: unplug the refrigerator, remove the ice bin, and visually check for jammed ice clumps around the auger mechanism — break up any clumps manually. If no jam is present and the motor is still silent after plugging back in, the auger motor 4681EA2002H has failed. If the motor stutters or starts and stops repeatedly, the Hall effect sensor 6501JB1006L is reporting a false jam — replace the sensor. Both parts can be replaced without replacing the full ice maker assembly.
4. 7Replace the ice maker assembly AEQ73110224 if fill cycle runs but no ice forms: after confirming water fills the mold during test cycle and freezer temperature is 0°F, but no ice ejects after 2–3 hours, the ice maker assembly has an internal failure (sensor, thermostat, or motor). To replace: unplug the refrigerator, remove the ice bin, disconnect the wire harness connector from the ice maker, remove the 3–4 mounting screws securing the assembly, and swap the new AEQ73110224. Reconnect the harness, reinstall the bin, and run a test cycle to confirm operation. Allow 24 hours for a full production cycle before evaluating results.

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. Supplies water to ice maker and door dispenser. Test ice maker solenoid for 200–500Ω before replacing. Located at rear lower section.

  $30–$50

  Buy on Amazon →

• LG Ice Maker Assembly AEQ73110224

  OEM replacement ice maker assembly for LG French door refrigerators (LRMVS3006S, LRFXS2503S, LRMVS3006D). Complete unit includes motor, mold, thermostat, and sensor. Standard LG service replacement for Er IS faults and harvest cycle failures. Verify model compatibility.

  $80–$130

  Buy on Amazon →

• LG Auger Motor 4681EA2002H

  Replacement auger motor for LG ice bin dispenser. Drives helical auger to move ice to dispenser chute. Replace when ice is present but dispenser does not release ice and motor is silent when paddle is pressed.

  $40–$65

  Buy on Amazon →

• LG Hall Effect Sensor 6501JB1006L

  OEM Hall effect sensor for LG ice maker auger motor. Monitors auger rotation and reports jams to control board. 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. Circulates cold air in the ice maker section. 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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