LG Washer Error Code nP

The nP code on an LG washer means the appliance is detecting insufficient voltage from the wall outlet. The machine requires a full 240V supply to operate, and it has measured a voltage lower than that threshold. This code is specific to electric models and points to a problem with the home's outlet wiring or circuit rather than the appliance itself.

No. The nP code means the appliance is not receiving adequate power and will not operate normally. Attempting to run the machine under low-voltage conditions can stress the motor and electronic components. You should leave the washer off until the electrical supply issue has been corrected by an electrician.

The cost depends on what the electrician finds during inspection. If the fix is simply resetting a tripped breaker, the cost would be minimal, mainly a service call fee typically in the range of $75 to $150. If a new outlet receptacle or wiring repair is needed, costs can range from $150 to $400 or more. If a new dedicated 240V circuit must be installed, costs can climb to $300 to $800 depending on the complexity and local labor rates.

Because the nP error points to a problem in your home's electrical wiring, outlet, or circuit breaker, it is not a DIY repair. Working inside a breaker panel or rewiring a 240V outlet carries serious risk of electrocution or fire. A licensed electrician should diagnose and correct the issue.

Resetting the washer will not resolve the nP error because the underlying problem is with the electrical supply from the wall, not with the appliance's internal settings. The code will return as soon as the machine checks the incoming voltage again. The outlet and circuit must be repaired first.