LG · Washer Serious
nP — No current detected at heater
On WashTower and combo units, nP indicates the control board sees zero current flowing to the heater — usually a household wiring / outlet issue rather than a washer fault.
- Keep using it?
- Limited use only
- DIY difficulty
- Moderate
- Verified against
- lg.com ↗
How to fix it
- Turn off the dryer/combo breaker for at least 10 seconds, then back on.
- Verify the cord is fully seated in the wall outlet.
- With a multimeter, measure across the outlet hot legs — should read 240V (208V in some commercial buildings).
- If only 120V is present, reset both halves of the double-pole breaker; if still 120V, call an electrician.
- Unplug the unit, pull off the rear terminal block cover, and check that all lugs are torqued tight and not burned.
- If wiring is solid and 240V is present at the cord, suspect the heating element or board.
- If nP persists after wiring is verified, call for service.
Why it happens
Typical signs: nP on the display · Cycle aborts when heat is requested · Cold cycles may complete · Often appears after install on a new outlet
- Outlet wired incorrectly 240V combo/WashTower needs a properly wired 240V receptacle matching the rating plate.
- Tripped or weak breaker Half of a double-pole breaker tripped — heater gets only 120V instead of 240V.
- Loose terminal block at washer Wires under the cover are loose — only one leg of 240V is live.
- Failed heater or harness Open heating element means zero current — same symptom as no power.
- Power surge or unstable supply Recent surge stressed wiring.
More LG washer codes
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: lg.com.