On the covered LG dryer platform, nP means no current is being detected at the heater — LG's own wording. LG states this normally indicates a problem with the electrical wiring in the home, not the dryer. First, check the power cord is securely plugged into a grounded outlet matching the dryer's 240 V rating plate.
Differential
Likely causes of “LG dryer code nP”, and how to tell them apart
- 1
No current is being detected at the heater (nP)
What separates it The dryer runs but does not heat, and the display shows nP
How to confirm Check the power cord is securely plugged into a grounded outlet matching the dryer's 240 V rating
- 2
One leg of the home supply is missing
What separates it Only half of the double breaker supplies power
How to confirm Switch the breaker off at the panel for at least 10 seconds, then back on
- 3
A problem with the electrical wiring in the home
What separates it The outlet reads low or one leg is dead
How to confirm Have a licensed electrician check the outlet
- 4
A loose cord or terminal connection
What separates it The plug or the terminal block is loose
How to confirm Reseat the cord
- 5
A failed heating element or relay
What separates it The supply is fine and the code stays
How to confirm A technician tests the heater
Before you touch a setting
Record this first — changing settings destroys the evidence
- That the display shows nP
- Whether the drum turns and the air is warm
- The state of both halves of the breaker
Try in this order
0 of 12 completedWhat to do first
ReversibleCheck the power cord is securely plugged into a grounded outlet matching the dryer's 240 V rating plate.
Correct only the documented fault domain
ReversibleSwitch the dryer's breaker off at the home's main for at least 10 seconds to clear the surge inside the breaker, then back on. LG directs that a home outlet still producing nP should be checked by a licensed electrician.
Check the cord
ReversibleLG says nP means no current is detected at the heater, which normally indicates a problem with the electrical wiring in the home. Make sure the cord is securely plugged into a grounded outlet matching the 240V rating plate.
Reset the breaker
ReversibleFrom the home's main, turn OFF the dryer's circuit breaker for at least 10 seconds to clear the power surge inside the breaker.
Inspect the outlet
ReversibleHave the home's outlet checked by a licensed electrician to make sure the correct voltage is supplied.
Request a repair
ReversibleIf the dryer is still not heating, the unit requires repair.
Check the power cord
ReversibleUnplug the dryer and make sure the cord is securely plugged into a grounded outlet that matches the dryer's 240 volt rating.
Reset the breaker
ReversibleLG says to switch the dryer's breaker off at the home's main for at least 10 seconds to clear the surge inside the breaker, and then back on.
Try a short cycle
ReversibleRun a timed dry and feel for warm air at the vent, which shows that the heater is receiving current.
Check both halves of the breaker
ReversibleA double-pole breaker must have both halves on, since a half-tripped breaker leaves the heater without power.
Have an electrician test the outlet
ReversibleLG directs that a home outlet still producing nP should be checked by a licensed electrician.
Book service if the supply is good
ReversibleIf the outlet is correct and nP stays, a technician tests the heating element and the relay.
Model-specific
What is true of this model and not of its siblings
- The code on this page
- nP, no current at the heater.
- Parts involved
- The outlet, the breaker, the cord, the heating element and the relay.
- LG's guidance
- Reset the breaker and have a licensed electrician check the outlet if nP continues.
- Why LG blames the house
- A dryer needs two live legs of 120 volts to give 240 volts at the heater. If one leg is dead, the motor still runs on 120 volts, but the heater has no current, which is what nP reports. That is a supply fault in the home and not a fault in the dryer.
- Do not test it yourself
- Measuring live voltage at a dryer outlet is dangerous. An electrician can test the outlet in minutes, and they can often find a loose connection at the breaker panel.
Stop boundary
When this stops being a self-service repair
- !Turn off the dryer's breaker and use a licensed electrician for any outlet or supply work
- !Do not test the outlet yourself with the dryer plugged in
- !LG directs that a home outlet still producing nP should be checked by a licensed electrician
- !Never open a plugged-in dryer
- !Do not alter the cord or the terminal block yourself
Evidence ledger
Sources behind this answer
Where the manufacturer's article stops. The 10 second breaker reset is LG's own.
Exact questions
Common questions
What does nP mean on a LG dryer?+
no current is being detected at the heater — LG's own wording. LG states this normally indicates a problem with the electrical wiring in the home, not the dryer.
What does nP mean?+
No current is detected at the heater.
Is it the dryer or the house?+
LG says it normally indicates a home wiring problem.
How long should the breaker be off?+
At least 10 seconds.
Do I need an electrician?+
For the outlet check, yes.
Is it the dryer's fault?+
LG states this normally indicates a problem with the electrical wiring in the home, not the dryer.
Why does the drum still turn?+
The motor runs on half the supply, but the heater needs both halves.
Who fixes the outlet?+
A licensed electrician.
Can a surge cause nP?+
LG says to clear the surge inside the breaker by switching it off for at least 10 seconds.
Is it dangerous to use the dryer with nP?+
The drum will turn, but it will not heat, so there is no danger, though the clothes will stay wet.