LG Dryer NP Error Code: Meaning, Causes & Fix
No current detected at the heater — displayed nP. LG's manuals define it for electric dryers: the electric dryer power cord is not connected correctly, or the house power supply is incorrect.
nP is an electric-dryer code, not a gas-dryer code. LG's US dryer error list: an nP display indicates a problem with the electrical wiring in the home and that no current is being detected at the heater. LG's owner manuals print the same entry: 'electric dryer power cord is not connected correctly, or house power supply is incorrect — check the power supply or the connection of the power cord to the terminal block'. The panel can appear alive while the heater receives nothing, so the dryer runs without heat or stops and reports nP. Gas LG dryers have a separate gAS code for a gas supply turned off; nP is not the gas model's code. nP rewards being read as a location report rather than a parts verdict. LG does not say 'heater failed' for this code; it says no current is being detected at the heater, and then points away from the appliance — at the electrical wiring in the home, at the house power supply, and at the connection where the power cord meets the terminal block. The panel staying alive is part of the message: the part of the supply the controls use can be present while the heater's supply is absent, and nP is the control honestly reporting that split. That is why LG's remedy list contains no dryer part — a breaker reset, an installer's cord check, an electrician's outlet check, and only then, with the supply proven, a repair service. Reading nP that way protects your wallet twice: it stops you buying heater parts for a house-wiring fault, and it stops you ignoring a high-current connection problem a parts swap would have left in the wall.
What causes the NP code on a LG dryer?
House power supply incorrect or incomplete
LG's first branch: the home wiring/supply is the problem — e.g. part of the 240V supply missing at the outlet, so controls respond but no current reaches the heater.
Power cord not connected correctly at the terminal block
LG's manual branch — a cord fitted incorrectly or a loose connection where the cord meets the terminal block; the classic nP backdrop on a just-installed or just-moved dryer.
A unit-side fault, only after the supply is proven
LG's list ends here: if the dryer is still not heating after the breaker reset and supply/cord checks, the unit requires a repair service. LG names no specific part for nP.
A dryer that was just installed, moved or re-corded
Timing is the loudest clue nP gives. LG's error list directs owners whose unit was just installed to call the installer back to check the power cord installation and the wall outlet, and its manuals word the code itself as a cord-connection fault. A cord changed during a move (three-wire to four-wire conversions are the classic moment), a terminal-block connection left loose, or a new outlet wired incorrectly all present as nP on the first heated cycle in the new position. An nP with an installation in its recent past is an installation fault until the installer proves otherwise.
One side of the 240-volt supply missing at the outlet
An electric LG dryer lives two electrical lives at once: controls, display and motor can appear to work while the heater — the component that needs the full 240-volt supply on LG's rating plate — receives no current at all. That split is exactly what nP reports. A breaker tripped on one side, or a receptacle fault dropping part of the supply, produces the signature owners describe: lights on, drum turning, no heat, then nP. LG's remedies for this branch are the breaker reset (off at the main panel for at least 10 seconds) and a licensed electrician checking the home's AC outlet to ensure the correct voltage is supplied.
Its neighbour PS: the cord wired wrongly, not the supply missing
nP shares its section of LG's error list with PS, and separating the two saves a misdirected repair. LG defines PS as an improper voltage within the power cord, which could be caused by the white and red wires being reversed on the dryer's terminal block. Read practically: PS accuses the cord's wiring at the terminal block, while nP reports that no current is being detected at the heater and points first at the home's electrical wiring and supply. Either letter on a dryer that just had a cord fitted sends you to the same safe place — the cord installation checked against LG's model-specific instructions, by the installer or an electrician.
Checks to run before you replace anything
- At the main panel, turn the dryer circuit breaker off for at least 10 seconds, then back on — LG's published first step for nP, to clear the power surge inside the breaker.
- Confirm the power cord is securely plugged into a grounded outlet matching the dryer's rating plate of 240 volts (LG's wording). Do not open the terminal block or test live 240V connections yourself.
- If the dryer was just installed or moved, call the installer to check the power cord installation and the wall outlet (LG's direction); the home's AC outlet may need checking by a licensed electrician to ensure correct voltage is supplied.
- Start with the check LG prints first, at the panel rather than the dryer: from the home's main, turn off the dryer circuit breaker for at least 10 seconds to clear the power surge inside the breaker, then back on and run a heated cycle. Record honestly what the dryer does — panel alive, drum turning, heat absent, nP displayed is the full signature LG's definition predicts, and it is the first thing an electrician or LG service agent will ask for.
- Verify the plug-and-outlet facts you are allowed to verify: LG instructs owners to make sure the power cord is securely plugged into a grounded outlet matching the dryer's rating plate of 240 volts. Confirm the plug is fully seated and the outlet is the dryer's rated receptacle — and stop there. LG routes the outlet's actual voltage to a licensed electrician, and the terminal block is not a homeowner inspection point: a 240-volt dryer circuit makes a curious look the most expensive step of the repair.
- Establish the installation timeline before condemning anything: was the dryer installed, moved, re-corded or relocated recently, or has the home had electrical work or a new outlet? LG's routing depends on the answer — just-installed units go back to the installer for the cord installation and wall outlet; established installations with a sudden nP go to an electrician for the outlet check. A dryer that dried for years in the same spot and one on its first load in a new home share a code, not a diagnosis.
- Do not let a Sensor Dry or ThinQ feature distract the diagnosis: nP appears in those models' manuals with identical wording — electric dryer power cord not connected correctly, or house power supply incorrect. The code is not reporting the moisture sensor, the steam system or the Wi-Fi connection. Note instead whether nP appears the moment a heated cycle starts (a supply the heater never receives) versus part-way through (a supply that drops under load) — both branches end at the same electrician-or-service decision, but the timing is evidence.
How to fix np error code lg dryer?
- Restore a correct, verified 240V supply and a correctly connected power cord (installer/electrician work — dryer circuits are high-current).
- If nP and the no-heat symptom persist after the breaker reset with supply and cord proven correct, request LG repair service — where LG's published nP guidance ends.
- Work LG's ladder in its published order and stop at the rung that holds: breaker off for at least 10 seconds and back on; plug confirmed secure in the grounded 240-volt outlet; installer recalled if the unit was just installed, to check the power cord installation and the wall outlet; licensed electrician to check the home's AC outlet voltage on established installations. Each rung is cheap, safe and decisive, and together they cover every cause LG names for this code.
- Have the power cord's connection to the terminal block checked and corrected by the installer or an electrician if the timing points there — after a move, a cord change or a new installation. LG's manual entry for nP names exactly this connection, and it is professional work because it is a high-current joint: a loose terminal-block connection overheats under heater load and damages block and cord over time.
- Accept LG's endpoint without improvising past it: if the dryer is still not heating after the breaker reset and the supply and cord have been proven, LG states the unit requires a repair service. LG publishes no owner part replacement for nP — no element, fuse or board an owner is directed to swap — because once the supply is proven, what remains is unit-side diagnosis with the model's service information.
- While the dryer waits for its electrician or service visit, keep it off heated cycles. An nP dryer cannot dry — its heater has no current — and repeatedly running it adds motor hours without drying anything while a possibly faulty high-current connection sits under load. Leaving the breaker off until the visit is the cautious default: a power fault is the one dryer code family where 'keep using it meanwhile' is never the right answer.
The part that usually fails: None initially — the supply and the cord connection
nP condemns the installation first: house supply, then the cord's connection to the terminal block. LG names no dryer part for this code.
Lg dryer np error code reset
LG's nP reset is the breaker step: dryer circuit breaker off at the main panel for at least 10 seconds, then back on. nP clears when the heater draws current on a test cycle; a returning code means supply, cord connection or unit is still at fault.
LG dryer codes clear with a power cycle: unplug for about 5 minutes, hold the Power button for a few seconds while unplugged on some models, restore power and run a test load. Flow Sense bars and codes like D80 are computed fresh from airflow measurements each cycle, so they only 'reset' by fixing the airflow — a power cycle alone cannot clear a genuine restriction.
Why does the NP code keep coming back?
nP after a proven-correct supply and cord = the unit-side branch (LG repair service). nP appearing only after installation, a move or home electrical work = the installation branch again. When nP comes back, its timing after the fix is the diagnosis. Returning on the first heated cycle after a cord or outlet repair means that repair did not reach the actual break — the connection, receptacle or breaker branch needs re-examination by the electrician who did it. Returning only under heater load, after minutes of apparently normal drying, describes a marginal high-current joint heating up and opening — the terminal-block connection is the standing suspect, and it should be inspected promptly rather than run, because a joint that opens under load is also a joint that overheats. And an nP that survives a licensed electrician's confirmation of correct voltage at the outlet and a correctly connected cord has exhausted LG's installation branches by definition: that is the unit-side case LG reserves for its repair service, and the electrician's confirmation is what gets the visit started at the dryer instead of back at your walls.
How to stop NP coming back
- House power supply incorrect or incomplete: LG's first branch: the home wiring/supply is the problem — e.g. part of the 240V supply missing at the outlet, so controls respond but no current reaches the heater.
- Power cord not connected correctly at the terminal block: LG's manual branch — a cord fitted incorrectly or a loose connection where the cord meets the terminal block; the classic nP backdrop on a just-installed or just-moved dryer.
- A unit-side fault, only after the supply is proven: LG's list ends here: if the dryer is still not heating after the breaker reset and supply/cord checks, the unit requires a repair service. LG names no specific part for nP.
Retrieving stored fault codes on LG dryers
LG dryers have an installation/test mode (used at install to verify venting and, on gas models, the gas connection) and a service test mode that steps through motor, heater, steam and sensor checks while showing stored codes (the tE family and others). The entry sequence is model-specific and printed in the service manual; running the install test after any vent work is the fastest way to confirm a Flow Sense fix.
Other LG dryer error codes
| Code | Meaning | First fix |
|---|---|---|
| ADD | Add water notice; the steam feeder needs water for a steam cycle. | Fill the steam feeder with tap water to the max line; close the drawer. |
| AE | Compressor error on heat-pump WashTower dryers; shown with LE2 (fold 'AE'). | Unplug, wait one minute, reconnect and retry; request service if it persists. |
| CL | Child Lock is ON — not an error (panel locked). | Hold the Child Lock button (or the marked pair) ~3 seconds until CL clears — the pairing is printed on the panel. |
| D80 | Flow Sense: exhaust airflow is about 80% blocked — vent restriction warning (80% level of the D80/D90/D95 family). | Clean the entire vent run properly (rotary brush kit or a vent-cleaning service) — from the dryer to the outside hood, not just the ends. |
| D90 | Flow Sense: exhaust about 90% blocked — serious vent restriction (mid-level of the D80/D90/D95 family). | Full vent-run cleaning (brush kit or service), hood to dryer. |
| D95 | Flow Sense: exhaust about 95% blocked — the dryer stops for safety (top of the D80/D90/D95 family). | Clean the full vent run with a rotary brush; clear/repair the hood; replace crushed or foil hose with metal duct. |
| E13 | Drain error on hybrid condensing dryers; sump water cannot drain. | Straighten and clear the drain hose, use only the standard hose, restart. |
| FO | Filter notice (display F0); the lint filter is out of its housing. | Remove the lint filter and reinsert it fully into the filter housing. |
| H5 | Humidity sensor error — the dryer's moisture (humidity) sensor is faulty or its signal is implausible. | Clean the strips (above) — always the first step. |
| HS | Humidity sensor error; the humidity sensor is faulty. | Wipe the sensors with a damp rag, let them dry fully, then retry. |
| IF | Filter installation notice on WashTower dryers; the lint filter is not detected (fold 'IF'). | Assemble both filter parts correctly and check the magnet is in place. |
| LE1 | Motor error variant on LG dryers — LE-family motor fault (locked/abnormal motor operation) as rendered on certain dryer platforms. | Open the cabinet (unplug) and service belt/idler/rollers; clear obstructions. |
| LE2 | Compressor error on heat-pump WashTower dryers; problem with the drying compressor (fold 'LE2'). | Unplug, wait one minute, reconnect and retry; request service if it persists. |
| LE3 | Air circulation motor error on WashTower dryers. | Unplug, wait one minute, reconnect and retry; request service if it persists. |
See the full list on the LG Dryer error codes hub.
Codes NP gets confused with
TE1 — Thermistor error — a problem was detected with the dryer's thermistor (temperature sensor). LG renders it tE1 and lists it with tE3; owner manuals group tE1 through tE7 as temperature sensor failure. tE1 reports that the control detected a problem with the dryer's thermistor — the temperature sensor it relies on to regulate heat.
D90 — Flow Sense: exhaust about 90% blocked — serious vent restriction (mid-level of the D80/D90/D95 family). D90 means LG's Flow Sense measures the exhaust at roughly 90% restricted.
D95 — Flow Sense: exhaust about 95% blocked — the dryer stops for safety (top of the D80/D90/D95 family). D95 is the Flow Sense end-state: the exhaust is effectively blocked (~95%), so the LG dryer cuts heat/cycle to protect itself and your house.
LE1 — Motor error variant on LG dryers — LE-family motor fault (locked/abnormal motor operation) as rendered on certain dryer platforms. LE1 belongs to the motor-fault family (Samsung and LG both use LE-style prefixes for motor issues; on LG dryers LE1 is met on specific platforms as the motor error rendering).
Frequently asked questions
Is NP a gas dryer code on LG dryers?
No. LG's manuals print nP for electric dryers — power cord not connected correctly or house power supply incorrect, with no current detected at the heater. Gas LG dryers have their own separate code, gAS, for a gas supply or service turned off.
How do I fix the NP error code on my LG dryer?
Work the causes LG publishes for nP, in order. The code means no current is being detected at the heater, and LG's manuals define it as an electric dryer whose power cord is not connected correctly or whose house power supply is incorrect. So: turn the dryer circuit breaker off at the main panel for at least 10 seconds and back on; confirm the cord is securely plugged into a grounded outlet matching the dryer's 240-volt rating plate; if the dryer was just installed, have the installer check the power cord installation and the wall outlet; and have a licensed electrician check the home's outlet voltage if the supply itself is in question. If the dryer still does not heat after that, LG says the unit requires a repair service.
How do I reset the LG dryer NP error code?
LG's reset for nP is a breaker reset, not a button sequence: from the home's main panel, turn off the dryer circuit breaker for at least 10 seconds — LG's wording is that this clears the power surge inside the breaker — then turn it back on and run a heated cycle. The code clears when the heater again draws current on that cycle. If nP returns on the test cycle, the cause LG names — an incorrect house supply or an incorrectly connected power cord — is still present, and the next step is the installer or a licensed electrician, not another reset.
What does error code NP mean on an LG electric dryer?
On an LG electric dryer, nP means the control is detecting no current at the heater. LG's US error list attributes it to a problem with the electrical wiring in the home, and LG's owner manuals print the matching entry: 'electric dryer power cord is not connected correctly, or house power supply is incorrect — check the power supply or the connection of the power cord to the terminal block'. It is specific to electric models: the dryer can light its panel and even tumble while the heater receives nothing, which is why the presenting complaint is usually 'runs but no heat' alongside the code.
What does error code NP mean on an LG Sensor Dryer?
Exactly what it means on every other LG electric dryer — the Sensor Dry name does not change the code. LG prints the identical nP entry in Sensor Dry manuals: the electric dryer power cord is not connected correctly, or the house power supply is incorrect, with no current detected at the heater. It is not a moisture-sensor report, and cleaning the sensor strips inside the drum will not clear it. Follow the supply path instead: breaker off for at least 10 seconds and back on, plug secure in the grounded 240-volt outlet, installer or licensed electrician for the cord connection and outlet voltage, and LG repair service if the dryer still does not heat on a proven supply.
My LG ThinQ dryer shows error code NP — what should I do?
Treat it as the same electrical report every LG electric dryer makes, because ThinQ models carry the identical nP entry in their manuals: no current detected at the heater, caused by an incorrectly connected power cord or an incorrect house power supply. Do LG's steps — breaker off at the main panel for at least 10 seconds and back on, cord secure in its grounded 240-volt outlet, installer check if the dryer was just installed, licensed electrician for the outlet voltage — and request LG repair service if it still does not heat. The ThinQ connection itself is neither the cause nor the cure here; at most, use it to note exactly when the code appears, which helps whoever you hand the job to.
How to fix np error code lg dryer?
Start here: Restore a correct, verified 240V supply and a correctly connected power cord (installer/electrician work — dryer circuits are high-current). If nP and the no-heat symptom persist after the breaker reset with supply and cord proven correct, request LG repair service — where LG's published nP guidance ends.
Related guides
Facts on this page were checked against manufacturer documentation: www.lg.com · www.lg.com · www.lg.com