LG Dryer nP Error
Lowercase n, uppercase P — and not PS: nP is about current reaching the heater; PS is about voltage in the cord. LG gives them separate entries.
What to check first
- nP = no current detected at the heater; LG blames the home wiring.
- Checks in order: grounded 240V outlet → breaker OFF 10 seconds → electrician checks the outlet.
- Still not heating with supply proven → repair service.
- Nothing inside the outlet or panel is a user check — LG draws that line itself.
An nP code means, in LG's US wording, there is a problem with the electrical wiring in the home, and no current is being detected at the heater. Its checks stay on the supply side, in a careful order: the cord seated in a grounded outlet matching the 240V rating plate, the breaker switched OFF for at least 10 seconds, and then the boundary LG draws explicitly — the outlet should be checked by a licensed electrician. If the dryer is still not heating after that, LG's endpoint is repair service. There is no parts procedure for nP, because the code is not accusing a part.
Safety first
- nP is an electrical-supply code: the checks on this page stop at the outlet, exactly where LG stops them. Anything inside the outlet, the breaker panel or the home wiring belongs to a licensed electrician — LG says so itself.
- Stop condition: stop using the machine and unplug it — and do not run it again until it has been checked — if you smell burning, see smoke, find damaged electrics (a scorched plug, a melted or cut cable), or water is leaking in quantity.
Common causes
The home wiring / supply side
LG's definition is the cause: the problem is with the electrical wiring in the home. The heater is reporting an absence — no current detected — which is why every published check is about the outlet, the breaker and the cord's seat, and none is about the dryer's internals.
A breaker half-tripped or a poor outlet connection
LG's two user checks target exactly this territory: a grounded outlet that matches the 240V rating plate, and a breaker reset held OFF for at least 10 seconds from the main power supply. A 240V dryer circuit can lose one leg and leave a motor running without heat — the not-heating symptom LG names.
Step-by-step checks
- Check the cord and outletMake sure the power cord is plugged securely into a grounded outlet matching the 240V rating plate requirement. (LG US step 1.)
- Reset the breaker — OFF for at least 10 secondsTurn the dryer's circuit breaker OFF from the main power supply for a minimum of 10 seconds, then back ON. (LG US/UK.)
- Have the outlet checked by a licensed electricianLG's step, with its boundary in its own words: the outlet should be checked by a licensed electrician. This is not a user test with a multimeter unless you are that electrician.
- Still not heating? Book repair serviceLG's endpoint: if the unit is still not heating, it will require a repair service.
When to call a technician
Two endpoints, by LG's own split: the outlet goes to a licensed electrician; the dryer (supply proven good, still not heating) goes to repair service. Quote nP exactly, and say which side has already been checked — it saves a duplicated visit.
Model differences
| What you have | What changes |
|---|---|
| Gas dryer | nP is documented on LG's lists in the 240V electric context (heater current, rating plate). A gas dryer's supply codes differ by model — if a gas unit shows nP, the supply-side order (outlet, breaker, electrician) is still LG's pattern, but let the model manual confirm it. |
| Display reads PS instead | PS is improper voltage within the power cord — terminal-block wiring territory, just-installed machines especially: the PS page. |
One-page checklist — nP
- Code read as nP (no current at the heater)
- Cord secure in a grounded outlet matching the 240V rating plate
- Breaker OFF ≥10 seconds, then ON
- Outlet check booked with a licensed electrician (LG's boundary)
- Supply good + still not heating → repair service
Official LG references
Frequently asked questions
Is nP a fault in the dryer or in my house?
LG's US definition answers directly: a problem with the electrical wiring in the home — no current is being detected at the heater. That is why its checks are outlet and breaker checks, why the outlet check belongs to a licensed electrician, and why the dryer only goes to repair service if it still will not heat with the supply proven.
The drum turns but there is no heat. Is that nP's symptom?
It fits LG's endpoint exactly: “if the unit is still not heating, it will require a repair service.” On a 240V circuit the motor and the heater draw differently, so a supply problem can leave one working without the other — work LG's checks in order rather than assuming the heater element first.
nP vs PS — which do I have?
Read the display: nP is no current detected at the heater (wiring in the home); PS is improper voltage within the power cord (cord/terminal-block installation). LG lists them side by side because they split the supply problem in two — the checks differ, so the digit matters.