LG Washer Error Code nF

The nF code on an LG washer stands for Water Supply Error. It indicates the washer is not receiving water correctly, either due to a blocked or faulty water supply valve, a disconnected wiring terminal, incorrectly connected hoses, or water temperature exceeding the safe limits for the selected cycle. The machine stops the cycle to prevent incomplete washing or potential damage.

No, you should not attempt to run a wash cycle while nF is active. The error means water is not entering the machine as intended, so any cycle started would be incomplete or could run without adequate water, potentially harming fabrics or the machine. Resolve the underlying cause before resuming normal operation.

Repair costs depend on the specific cause. Cleaning valve inlet screens or reconnecting a terminal costs little to nothing if done yourself. If the water supply valve needs full replacement, parts typically range from $25 to $80, with professional labor adding $75 to $150 depending on your area. If the repair requires a service call for diagnosis and part replacement, total costs commonly fall between $100 and $250.

Start by checking the wiring terminal at the water supply valve and reconnecting it if it has come loose. Next, turn off the water supply, remove the inlet hoses, and inspect and clean the filter screens inside the valve ports. Confirm that the warm water and rinse hoses are connected to the correct ports on the back of the machine. If those steps do not resolve the error, the water supply valve itself may need to be replaced.

A reset may temporarily clear the display, but the nF error will return if the root cause has not been addressed. Unplugging the washer for a few minutes resets the control board, but if the water supply valve is blocked, disconnected, or failed, the error will reappear when the machine attempts to fill again. Fix the underlying issue first for a lasting resolution.