How do I fix error code E UC on a LG refrigerators?

1. undefined: Step 1: Check connector between Sub PCB and UVC LED. If disconnected or loose, reconnect or repair connector. 2. undefined: Step 2: Enable 'Self Care' function. Measure voltage at CON2 14th Pin ~ 13th Pin. Expected: 11.4~12.6V (Self Care ON) or 0~1V (Self Care OFF). If not matching, replace Sub PCB assembly. 3. undefined: Step 3: Measure voltage at CON2 12th Pin ~ 13th Pin with Self Care ON. Expected: Not 0 or 5 (signal oscillating). If reads 0V or 5V (static), replace UVC LED. 4. undefined: Step 4: If connector is confirmed good and PCB voltage is correct but UVC LED still fails, replace UVC LED. 5. undefined: Step 5: If all checks pass, reconnect or repair connector.

LG Refrigerators

Error Code E UC

Defect of UVC LED — UVC LED disconnected or UVC LED failure. Check UVC LED connection.

Moderate

Address soon - your appliance may not work properly

Also displayed as: E UC

How to Fix

1
Step 1: Check connector between Sub PCB and UVC LED. If disconnected or loose, reconnect or repair connector.
2
Step 2: Enable 'Self Care' function. Measure voltage at CON2 14th Pin ~ 13th Pin. Expected: 11.4~12.6V (Self Care ON) or 0~1V (Self Care OFF). If not matching, replace Sub PCB assembly.
3
Step 3: Measure voltage at CON2 12th Pin ~ 13th Pin with Self Care ON. Expected: Not 0 or 5 (signal oscillating). If reads 0V or 5V (static), replace UVC LED.
4
Step 4: If connector is confirmed good and PCB voltage is correct but UVC LED still fails, replace UVC LED.
5
Step 5: If all checks pass, reconnect or repair connector.

This Error Applies To

LG LRYXC2606 Series Refrigerators

Service manual exact match: LRYXC2606SService manual exact match: LRYXC2606VService manual exact match: LRYXC2606BService manual exact match: LRYXC2606D

Related Error Codes

E Id

Defect of freezer craft ice maker sensor — short-circuit or disconnection of craft ice maker sensor

E IC

Defect of Mini Cubed ice maker kit — malfunction of Mini Cubed ice maker motor

E rS

Defect of refrigerator sensor — short-circuit or disconnection of refrigerator sensor

E FS

Defect of freezer sensor — short-circuit or disconnection of freezer sensor

F dH

Defrosting failure — defrost sensor does not reach 40°F (5°C) within 80 minutes after defrost starts. Causes: disconnected thermal fuse, defective defrost heater, defective heater relay, drain tube blockage.

E FF

Defect of BLDC fan motor for freezer — no feedback signal from fan motor for more than 65 seconds

E IF

Defect of BLDC fan motor for ice compartment — no feedback signal from fan motor for more than 65 seconds. Causes: defect of BLDC motor connection, Drive IC, or TR.

E CF

Defect of BLDC fan motor for machine room — no feedback signal from condenser fan motor for more than 65 seconds

Need more help with your LG refrigerators?