What causes the Er IT code on a LG refrigerator?

Jammed ice harvest mechanism: Frozen-together cubes block the auger or tray flip. Failed ice maker module: Internal motor or controller in the icemaker module. Failed fill tube or chute icing: Slush refreeze blocks the fill cup.

LG · Refrigerator Moderate

Er IT — Ice maker assembly internal fault

The ice maker assembly reported an internal system error during a self-test — typically a stuck motor, sensor, or harvest mechanism inside the ice maker module.

Keep using it?: Yes, with caution
DIY difficulty: Moderate
Verified against: lg.com ↗

How to fix it

Unplug the unit and remove the ice bin/assembly.
Thaw any ice blockage in the chute or fill cup with warm water.
Inspect the ice maker harness/plug; reseat firmly.
Reinstall and run the ice maker self-test (per owner's manual).
If Er IT returns, replace the ice maker assembly as a unit.
Verify fill volume is correct — overfilling causes refreeze.

Why it happens

Typical signs: Er IT on display · Ice maker not cycling · Cubes partially formed and stuck · Self-test fails on the ice maker

Jammed ice harvest mechanism Frozen-together cubes block the auger or tray flip.
Failed ice maker module Internal motor or controller in the icemaker module.
Failed fill tube or chute icing Slush refreeze blocks the fill cup.
Ice maker harness disconnected Connector at the ice maker plug unseated.

Replace your water filter

A clogged or overdue water filter is a common cause of low water and ice flow on LG refrigerators — they are meant to be changed about every 6 months. The OEM-style filter that fits most LG refrigerators is the LT1000P ($45-55 OEM, $18-28 compatible).

LG LT1000P refrigerator water filter OEM water filter
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Not sure which filter fits your model? See the full compatibility guide →

Parts you may need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

LG ice maker assembly Common replacement
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Related repair guides

LG Refrigerator Water Filter Guide (LT1000P, LT800P & More) →Refrigerator Ice Maker Not Making Ice — Causes & Fix →Refrigerator Water Dispenser Slow or Not Working — Fixes →Refrigerator Water Tastes Bad or Smells — Causes & Fix →

More LG refrigerator codes

22 22 — Compressor relay / inverter control fault 33 33 — Compressor / defrost test fault 67 67 — Door open / not fully closed 88 88 — Power-on display test (not a fault) Er CF Er CF — Condenser fan motor feedback fault Er CO Er CO — Communication error (main board ↔ display)

All LG codes → All refrigerator codes →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: lg.com.