Er IS Moderate Moderate DIY

LG Refrigerator Er IS — Ice maker fan motor / sensor fault

LG Refrigerator · Error code Er IS

What Er IS Means

The ice maker compartment fan or ice maker sensor is open, disconnected, or stalled — most often frost on the ice room fan or a failed sensor in the ice room.

Symptoms

  • Er IS (or Er 1S) on display
  • No ice production
  • Frost in the ice compartment
  • Ice room warmer than normal

Common Causes

1
Iced/stalled ice-room fan

Door seal leak lets humid air freeze the fan.

2
Failed ice-room fan motor

BLDC fan failed mechanically or electrically.

3
Disconnected ice maker sensor

Connector unseated during service or by vibration.

4
Failed ice maker sensor

Open NTC sensor in the ice compartment.

How to Fix It

  1. Empty the ice bin and leave the freezer/ice door open for 8+ hours to defrost.
  2. After drying, restore power and watch for Er IS.
  3. If it returns, remove the ice room cover and check the fan for free rotation.
  4. Reseat the ice-room sensor and fan harness connectors.
  5. Replace the ice-room fan motor if stalled or noisy.
  6. Replace the ice-room sensor if out of resistance spec.

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.

Common replacement Ice room fan motor View on Amazon→ Common replacement Ice maker compartment sensor View on Amazon→

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 Fault Er CO Er CO — Compressor / Communication Fault

All LG codes → All refrigerator codes →

Verified against manufacturer documentation: lg.com

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.