LG Refrigerator Error Er IC — What It Means & How to Fix It

What Does This Error Mean?

Er IC means there is a communication error between the main control board and the ice maker control board. Modern LG refrigerators have a separate small control board specifically for the ice maker. These two boards communicate over a data connection. When that connection fails or is interrupted, Er IC appears and the ice maker stops working. The main refrigerator and freezer continue to cool normally.

Affected Models

LRMVS3006S
LRFXS2503S
LRMDC2306S
LFXS26973S
LG French door models with in-door ice makers (2015+)

Common Causes

The communication wiring harness between the main board and ice maker board has come loose
The ice maker control board has failed
The connection points in the door hinge wiring (which carries signals to the in-door ice maker) are corroded or damaged
The main control board has a fault preventing it from communicating with the ice maker module
A firmware glitch in the ice maker module after a power interruption

How to Fix It

Turn off the ice maker using the button inside the refrigerator or on the control panel. Unplug the refrigerator for 5 minutes. Plug it back in and turn the ice maker back on. Wait 10 minutes and check if Er IC clears.

A power cycle resets both the main control board and the ice maker board simultaneously. This resolves Er IC when the cause was a temporary communication glitch from a power fluctuation.
Check the wiring that runs through the door hinge area (for in-door ice maker models). Open and close the door several times and listen or feel for any pinching or catching in the hinge. The communication cable can be damaged at the hinge point.

On LG French door models with in-door ice makers, the wiring passes through the left door hinge. Inspect the hinge area for visible damage to the wiring harness.
If you can access the ice maker assembly, check the wiring connector on the ice maker board. It should be fully seated and click-locked in place. Reconnect it firmly.

On some LG models, the ice maker can be removed by lifting it off two tabs and tilting it forward. This gives access to the connector without tools.
Check your LG refrigerator's warranty status at lg.com/us/support. Er IC is a common LG fault that is frequently covered under warranty or a manufacturer service bulletin. An LG technician may have seen this exact issue on your model before.

Some LG models have documented firmware updates that address Er IC communication errors. LG customer support can advise whether an update is available for your model.
If warranty has expired and simple fixes have not worked, schedule service with an LG-authorized technician. They will use an LG service tool to test communication between the boards and identify whether the ice maker board, main board, or wiring is the failure point.

Do not guess and replace both boards. Always get a confirmed diagnosis. The ice maker board fails more commonly than the main board in Er IC cases.

When to Call a Professional

Er IC requires tracing the communication wiring between the main board and ice maker. Ice maker board replacement typically costs $100–$250 including parts and labor. If the main control board has failed, expect $300–$500. Contact LG at 1-800-243-0000 to check warranty. Ice maker repairs are covered under the standard 1-year warranty.

Frequently Asked Questions

Will Er IC make my refrigerator stop cooling?

No. Er IC only affects the ice maker. The main refrigerator and freezer cooling systems work completely independently. Your food is safe. You just will not get ice until the communication issue is resolved.

How long does the Er IC repair take?

A power cycle reset takes 5 minutes. If the ice maker board needs replacing, a technician typically completes the job in 1 hour. If wiring in the door hinge is damaged, repair time can be 1–2 hours depending on the extent.

Is Er IC covered under LG's warranty?

Under the standard 1-year parts and labor warranty, yes. LG also offers a 5-year linear compressor warranty and a 7-year sealed system warranty — but these do not cover the ice maker electronics. If you purchased an extended service plan from the retailer, check those terms as well.