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

What Does This Error Mean?

Er IT means the ice maker temperature sensor has a fault. The ice maker has its own dedicated sensor that monitors the temperature inside the ice tray and housing. This sensor tells the ice maker when the water has frozen solid and is ready to be harvested into the bin. Without a working sensor, the ice maker cannot time its harvest cycles correctly. Ice production stops or becomes unreliable when Er IT appears.

Affected Models

LRMVS3006S
LFXS26973S
LRFXS2503S
LRMDC2306S
LSXS26366S
LG French door and side-by-side refrigerators with automatic ice makers

Common Causes

The ice maker temperature sensor (thermistor) has failed due to age or freezing cycles
Ice accumulation around the sensor probe has physically damaged or disconnected it
The sensor wiring connector has corroded in the cold and humid ice maker environment
A cracked or broken sensor probe is allowing moisture to alter its resistance readings
The ice maker control board has a fault affecting how it reads the temperature sensor

How to Fix It

Turn off the ice maker using the on/off switch or button inside the freezer or door panel. This prevents it from attempting harvest cycles with a faulty sensor.

Leaving the ice maker running with a faulty temperature sensor can lead to failed harvest cycles — the ice may not fully freeze before ejection, or the ice maker may run endlessly without harvesting.
Unplug the refrigerator for 5 minutes, then plug it back in and turn the ice maker back on. Check after 30 minutes whether Er IT has cleared.

Temporary sensor faults caused by ice contact, condensation, or a power event may clear after a power cycle. If Er IT does not return within a few days, monitor and hold off on calling a technician.
If Er IT returns, manually defrost the ice maker area. Unplug the refrigerator and open the freezer door for 2 to 4 hours to thaw any ice that may have accumulated around the sensor.

Ice buildup around the sensor probe can cause it to read incorrectly or disconnect the wiring. A full thaw allows you to check the sensor for visible damage or loose connectors.
After thawing, inspect the sensor area for visible damage. Check that the sensor connector is firmly plugged in. Dry any moisture before restoring power.

The ice maker temperature sensor is typically located near the ice tray area — a small probe on a thin wire. If it is visibly cracked or the wire is broken, the sensor needs replacement.
If Er IT continues after manual defrost and power cycling, call an LG service technician. They will test the sensor's resistance with a multimeter and replace it if it is out of specification.

Check your warranty first at lg.com/us/support. Ice maker sensors are covered under LG's 1-year parts and labor warranty. If out of warranty, expect $100 to $250 for parts and labor.

When to Call a Professional

Er IT is a moderate repair that LG service technicians perform regularly. Ice maker sensor replacement typically costs $100 to $250 including parts and labor. Unrepaired, the ice maker will stop producing ice — but the rest of the refrigerator continues to function normally. Contact LG support at 1-800-243-0000 to check warranty coverage. Schedule service at your convenience — this is not an urgent repair unless you rely heavily on ice.

Frequently Asked Questions

Will Er IT affect my refrigerator's main cooling?

No — Er IT only affects the ice maker. Your fresh food and freezer sections will continue to maintain correct temperatures. The ice maker will stop producing ice reliably, but all other refrigerator functions work normally. If you need ice while waiting for repair, use a countertop ice maker or bag ice from the store.

How does the ice maker know when ice is ready to harvest?

The ice maker temperature sensor monitors the temperature of the ice tray continuously. When the tray temperature drops to around 15°F to 17°F, the water has frozen solid. At that point, the ice maker activates the harvest heater to slightly warm the tray and release the ice cubes. The sensor then confirms the tray has returned to a normal temperature before allowing the next fill cycle. Without this sensor, the timing of these steps cannot be controlled correctly.

My ice maker stopped working but I don't see Er IT on the display. Is it the same problem?

Not necessarily — ice makers can stop working for many reasons besides a temperature sensor fault. Other common causes include: a clogged water filter, a blocked water supply line, a stuck ice maker arm or switch, or a frozen water inlet valve. Er IT specifically indicates a sensor error confirmed by the control board. If no error code is shown but the ice maker is not working, check the water supply, filter, and ice maker switch first.