LG Dryer NP Error: No power to heater
LG dryer error — here’s what you need to know. The nP error code on your LG dryer indicates No Power to Heater – Missing Electrical Supply to Heating Circuit. This is a Medium severity issue. What Does nP Mean on an LG Dryer? The nP code means the control board cannot detect power reaching […]
~65%
DIY Fixable
From 0
Typical Repair Cost
15 – 45 min
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
Maybe. The dryer can tumble but will not dry clothes without heat. Continue using it only to confirm the drum and motor work; do not ignore the underlying power supply fault as it may indicate a wiring problem that needs correction.
Can I reset the code?
Yes. Reset the circuit breaker and restart the dryer. If nP returns, the outlet voltage should be verified before suspecting an internal component fault.
When to stop immediately?
Stop if you notice: The power cord outlet shows burn marks or the plug is discolored — electrical arcing has occurred and the outlet must be replaced immediately., The circuit breaker trips again immediately after being reset, indicating a short circuit in the dryer or wiring..
Symptoms You May Notice
Dryer tumbles but produces no heat
The drum rotates and the cycle timer counts down normally, but clothes remain cold and damp throughout the entire cycle because the heating circuit has no power.
Cycle takes much longer than normal to dry clothes
Without heat, evaporation depends only on airflow, so drying times can triple or more — users often notice clothes are still damp after a full timed cycle.
nP code displayed on control panel
The error code appears during the cycle as the control board confirms the heater circuit is unpowered while the motor circuit is running normally.
Circuit breaker for dryer appears normal but one leg is tripped
A double-pole breaker that has partially tripped may not look visually tripped — the handle sits between ON and OFF — while one of the two 120V legs is actually interrupted.
Possible Causes
Partially tripped double-pole circuit breaker
One leg of the 240V double-pole breaker trips while the other remains on, leaving the motor circuit powered but the heating circuit unpowered.
DIY PossibleFaulty or under-voltage power outlet
A damaged 240V outlet with a loose or burnt terminal delivers only one leg of voltage to the dryer, starving the heater circuit of power.
Requires ProfessionalOpen thermal fuse or broken internal wiring
A blown thermal fuse in the heater circuit or a broken wire in the internal power supply wiring interrupts supply to the heating element or gas igniter.
Requires ProfessionalSafe Checks You Can Do
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1
Reset the circuit breaker
Go to your home electrical panel and locate the dryer's double-pole breaker. Switch it fully OFF, wait 30 seconds, then switch it fully ON. Even if the breaker did not look tripped, a full reset can restore a partially tripped leg.
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2
Check the dryer power cord connections
With the dryer unplugged, inspect the terminal block at the back where the power cord attaches. Tighten any loose terminal screws. A loose or partially inserted plug at the outlet can also cause one leg to drop out.
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3
Verify outlet voltage with a multimeter
Use a multimeter set to AC voltage and measure between the two hot slots of the dryer outlet (the angled slots). A reading of approximately 240V confirms both legs are present. A reading of 120V means one leg is missing and the outlet or breaker needs attention.
When to Call a Professional
Contact a qualified technician if:
- Outlet voltage test confirms only 120V reaching the dryer, requiring an electrician to repair or replace the circuit.
- Continuity test shows the dryer's thermal fuse is open (no continuity), requiring replacement of the fuse and investigation of the root cause overheat.
- Power cord terminal block shows melted plastic or burnt contacts requiring terminal block replacement.
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
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