LG Dryer nP Error — No Heater Current Fix

What it means

LG dryer nP is the no-current-at-heater code.
LG's exact wording: 'no current being detected at the heater.'
The control sent the command for the heater to fire and got no current feedback — meaning either the heater element itself is broken, the relay didn't switch, or the wiring between them has failed.
The drum can still tumble but clothes won't actually dry.

Affected Models

LG DLE / DLG series electric and gas dryers
LG DLEX / DLGX TurboSteam series with steam
LG Signature and Studio series premium dryers
LG DLHC series compact heat pump dryers
LG WashTower combo units (shared dryer module)

Common Causes

Heating element failed (open circuit — no continuity)
Heater relay on the control board stuck or failed
High-limit thermostat tripped and not reset (safety device)
Wiring connection to the heater loose or burned
Power supply not providing the 240V the heater needs (rare; usually triggers PS code instead)

How to Fix It

Confirm the dryer is on 240V (electric models).

If your LG dryer is an electric model and the household supply is 120V (rare but happens after wiring mistakes), the heater can't work and nP appears immediately on any heated cycle.
The plug should be the four-prong 240V type, not a 120V three-prong.
Power cycle for 5 minutes.

Unplug for 5 minutes (or trip the breaker for the same time).
This clears any transient fault state on the control board.
Plug back in and start a short Time Dry cycle with heat selected.
Test for hot air.

After about 2-3 minutes of running, briefly open the door and feel the air inside the drum.
It should be warm.
If the air is cold despite the cycle running, the heater isn't firing — confirming nP is real, not a transient.
Schedule LG service if nP persists.

The heater element, heater relay, and high-limit thermostat all need a technician with continuity testing and replacement parts.
Both the heater element and the high-limit are inexpensive parts — labour is the bigger portion of the service call.
An LG technician will identify which has failed.

When to Call a Professional

nP needs LG service.
The heater element, relays, and high-limit thermostat all require cabinet disassembly and electrical continuity testing — not an owner repair on modern LG dryers.

Frequently Asked Questions

Why does the drum keep tumbling if the heater is broken?

The drum motor and the heater are on separate circuits — the drum motor turns regardless of whether the heater is firing.
If nP appears mid-cycle, the drum keeps spinning and the cycle keeps counting down, but no drying actually happens because no heat is being added.
That's why you can have a 'running' dryer that produces cold air and damp clothes — the classic symptom that goes with nP.