LG Refrigerator ER IT Error — Ice Maker Test Mode Stuck

What Does This Error Mean?

ER IT means the ice maker is stuck in test mode — usually because someone (or something) held the test button down long enough to lock it in.
The ice maker will keep cycling without producing ice.
To clear it, press the test button briefly and let go, or unplug the fridge for 10 minutes.
If ER IT keeps reappearing, the test button itself is stuck or the harness has a short.

Affected Models

LG InstaView
LG French door
LG side-by-side
LG smart Wi-Fi refrigerator

Common Causes

Test button held down accidentally during cleaning
Test button physically stuck or pushed in by ice
Wire harness shorted causing a stuck test signal
Control board ice maker section glitched after a power event
Ice maker module itself defective

How to Fix It

Press and release the test button.

Find the test button on the ice maker module — usually a small round button labeled 'Test' or with a snowflake icon.
Press it briefly and release.
The ice maker should run one complete cycle and stop.
If ER IT clears, the issue was just the button stuck in or held too long.
Inspect the test button area.

Look at the test button.
Is it physically depressed, stuck in?
If you can wiggle it free, that may have been the cause.
Sometimes a chunk of ice has wedged the button down.
Pry it gently with a flathead screwdriver or your fingernail.
Unplug the fridge for 10 minutes.

Power off completely by unplugging.
Wait 10 minutes.
Plug back in.
This forces the control board to restart and clear any latched test states.
Watch the ice maker over the next hour — should run normal cycles, not continuous test cycles.
Check for water damage near the ice maker.

If water has dripped onto the ice maker module (slow leak, melted ice), the harness can short and falsely signal test mode.
Wipe everything dry and look for any signs of corrosion on connectors.
If you find moisture, the connector needs cleaning by a service tech.
Call LG if ER IT persists.

If pressing the button briefly, unplugging, and clearing any moisture all fail, the ice maker module itself is faulty.
Replacement modules run 150–250 USD parts plus labor.
It's typically a 30-minute repair for the technician.

Frequently Asked Questions

What does ice maker test mode do?

It runs one complete cycle: fill, freeze, eject, cycle off.
It's a service technician tool to confirm the ice maker is working without waiting hours for normal operation.
Triggering it accidentally just runs one cycle — but if the button latches in, the unit gets stuck and ER IT shows.

Can I bypass ER IT in firmware?

No.
The code is the system telling you the test signal is asserted continuously.
Bypassing it would mask a real issue.
The fix is freeing the stuck signal — either by clearing the button or replacing the module if hardware-stuck.