How to Fix LG French Door Refrigerator Error Code Er It: Icemaker Test Mode Error (Full Guide)

Symptoms of Error Code Er It

When your LG French Door refrigerator triggers the “Er It” code, the appliance is signaling a critical failure in the ice production cycle. You will notice the digital display panel flashing the code intermittently or locking the interface entirely to prevent further mechanical damage. Physically, the most common symptom is a complete cessation of ice production; the tray may be filled with frozen cubes that refuse to drop into the bin. You might also hear a repetitive “clicking” or “thumping” sound as the motor attempts to rotate a jammed tray. Furthermore, if the heater circuit is the culprit, you may notice that the ice cubes are slightly melted or “slushy” at the bottom of the tray because the internal heating element failed to properly release them during the harvest cycle.

Detailed Diagnosis: Root Causes

The “Er It” error is rarely a random occurrence; it is typically the result of specific component degradation. As a Safety Compliance Officer, I must emphasize that understanding the “Why” is critical to preventing electrical hazards.

• Icemaker Heater Failure: The most frequent cause is a burnt-out mold heater. This small heating element warms the bottom of the ice tray just enough to loosen the cubes for harvest. Over time, thermal fatigue causes the element to crack or short-circuit. When the control board sends voltage to the heater and detects no current flow (or improper resistance), it triggers the “Er It” code to prevent the motor from burning out while trying to force frozen cubes out of the tray.
• Defective Thermistor (Temperature Sensor): The thermistor monitors the tray’s temperature to tell the control board when the ice is frozen. If this sensor sends an “out-of-range” signal—often due to moisture intrusion or a “drift” in electrical resistance—the system enters an error state. This is often caused by long-term exposure to the high-humidity environment of the freezer.
• Mechanical Obstruction or Gear Stripping: If an ice cube becomes lodged in the ejection path, or if the plastic gears within the icemaker assembly strip due to age, the unit will fail its internal “test” movement. The control board interprets this mechanical resistance as a system failure.
• Control Board Communication Error: In rarer cases, a voltage spike or “dirty” power from your home’s electrical grid can glitch the main PCB (Power Control Board), causing it to misinterpret signals from the icemaker. This requires a hard reset or, in extreme cases, a board replacement.

Troubleshooting & Replacement Instructions

WARNING: SHOCK HAZARD. Before performing any diagnostic steps, you must disconnect the refrigerator from the power source. Failure to isolate the appliance from live electricity can result in severe injury or death. Do not touch exposed wiring with bare hands.

1. Perform a Hard Power Reset:
   Begin by unplugging the unit for a minimum of 10 minutes. This allows the capacitors on the main control board to discharge fully, clearing any temporary logic errors. Plug the unit back in and observe the display. If the code persists, proceed to the mechanical inspection.
2. Access the Icemaker Assembly:
   Open the left-hand French door where the indoor icemaker is housed. Remove the ice bucket by lifting it upward and pulling it out. Use your Phillips head screwdriver to remove the mounting screws securing the icemaker’s plastic shroud. Carefully pull the shroud forward to reveal the internal wiring harness. Safety Note: Be cautious of sharp plastic edges which can cause lacerations.
3. Inspect the Wiring Harness:
   Carefully examine the plastic molex connector. Ensure no pins are bent, scorched, or corroded. A loose connection here is a common failure point that mimics a component failure. Firmly reseat the connector to ensure a solid electrical bridge.
4. Conduct a Manual Test (The “Test Button”):
   Locate the small square “Test” button on the side or bottom of the icemaker unit. With the power restored (exercise extreme caution around live components), press and hold this button for 3 seconds. The icemaker should begin a harvest cycle. If it moves partially and stops, or if it doesn’t move at all while making a humming sound, the motor or heater has failed.
5. Test for Continuity with a Multimeter:
   Unplug the unit again. Set your multimeter to the Ohms (Ω) setting. Disconnect the icemaker harness and test the leads corresponding to the heater (refer to the wiring diagram on the back of your fridge). If the multimeter shows “OL” (Open Line), the heater is dead, and the entire icemaker assembly must be replaced, as the heater is an integrated component.
6. Replace the Icemaker Assembly:
   If the test fails, unscrew the remaining mounting bolts. Slide the old unit out and discard it responsibly. Slide the new OEM LG icemaker into the tracks, reconnect the wiring harness until you hear a “click,” and replace the cover and screws. Restore power and allow 24 hours for the first batch of ice to be produced.

How to Prevent Error Er It

Maintaining your refrigerator’s electrical and mechanical health is the only way to ensure the longevity of the icemaker components and avoid the “Er It” fault in the future.

Install a Dedicated Surge Protector: LG appliances utilize sensitive microprocessors that are highly susceptible to voltage fluctuations. A high-quality appliance surge protector can prevent the “logic glitches” and “Er It” codes caused by unstable power grids or lightning strikes. Ensure the protector is rated for the amperage of a full-size refrigerator.

Regularly Inspect for Ice Buildup: At least once every six months, remove the ice bin and check for “frosting” or “snow” around the icemaker’s mechanical arms. Excessive frost increases the load on the motor and can cause the heater to work overtime, leading to premature burnout. Use a plastic putty knife to gently remove any buildup; never use a metal knife or hair dryer, as the heat can melt the plastic components.

FAQ

Frequently Asked Questions

1. Can I continue to use my refrigerator while the “Er It” code is displayed?
While the refrigerator will generally keep your food cold, the “Er It” code indicates an electrical fault in the icemaker. As a safety professional, I recommend addressing this immediately. A failing heater circuit can, in rare instances, lead to localized overheating. It is best to disable the icemaker via the control panel until the repair is completed.

2. Is “Er It” the same as “Er IF”?
No. While they sound similar, “Er IF” (or Er 1F) typically refers to a failure of the Icemaker Fan. “Er It” is strictly related to the Icemaker Test/Heater circuit. The troubleshooting steps are entirely different, so ensure you have identified the characters correctly on your display before purchasing parts.

3. Why did my icemaker fail after only two years?
Icemakers are the most “active” mechanical part of a refrigerator, cycling multiple times a day. Factors such as hard water (which causes mineral buildup on the heater) or frequently opening the freezer door (which introduces humid air and causes frost) can accelerate the wear and tear on the “Er It” related components.