What causes the Er EIU code on a LG refrigerator?

Failed icemaker module: Internal motor or controller dead. Jammed harvest mechanism: Ice clump locks the assembly. Damaged harness: Door-hinge wiring broken.

LG · Refrigerator Moderate

Er EIU — Freezer-compartment ice maker assembly failure

LG documents EIU as a freezer-compartment ice maker assembly failure — the assembly reported an internal fault (motor, controller, or harvest mechanism). It typically requires replacing the ice maker assembly.

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

How to fix it

Unplug and remove the ice bin/assembly.
Thaw any visible ice block with warm water and dry thoroughly.
Reseat the assembly harness.
Run the self-test per owner manual.
If Er EIU returns, replace the in-door ice maker assembly.

Why it happens

Typical signs: Er EIU on display · Ice maker non-functional · Harvest motor stalled · Self-test fails

Failed icemaker module Internal motor or controller dead.
Jammed harvest mechanism Ice clump locks the assembly.
Damaged harness Door-hinge wiring broken.

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.

In-door 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.