LG Washer Error Code nU

The nU code on an LG washer indicates an NFC version mismatch error. It means the NFC module installed in the washer is not the correct version that the control board expects. This code only appears on the first screen of Test Mode and is intended for technician diagnostics. Resolving it requires replacing the NFC module with a compatible version.

No, a standard reset will not clear the nU error. The code is caused by a hardware version incompatibility between the NFC module and the control board, and that mismatch remains regardless of power cycling or factory resets. The error will continue to appear in Test Mode until the NFC module is replaced with a version-compatible unit.

The cost to fix a nU error depends on the price of the replacement NFC module and any labor charges if a technician performs the repair. NFC module parts for LG washers typically range from around 20 to 80 dollars depending on the specific model. If a technician is hired for the repair, labor costs can add anywhere from 50 to 150 dollars or more depending on your location and service provider.

The nU error requires replacing the NFC module, which involves disassembling part of the washer and working with internal components and wiring connectors. While a knowledgeable DIYer may be able to perform this replacement, identifying the correct version-compatible module is critical to resolving the mismatch. If the wrong module is installed again, the error will persist. Consulting a qualified appliance technician is recommended to ensure the correct part is sourced and installed.

The nU error code appears only in Test Mode and not during normal washing operation, so it does not directly interrupt wash cycles. The washer can typically still perform its standard functions. However, NFC-dependent features such as SmartDiagnosis may not work correctly until the module is replaced. It is best to have the module addressed to ensure full functionality and accurate diagnostics going forward.