LG Dryer nP Error Code: What It Means and How to Fix It
Updated · from manufacturer service documentation
nP (shown interchangeably with PS or PF) on an LG dryer means a power supply problem — either the power cord isn't connected correctly, house power supply is incorrect, or a fuse/breaker has tripped. Per the service documentation, this is a single error family covering electric-dryer power issues, not three separate faults.
What Causes the nP Code
| Cause | Likelihood | DIY difficulty | Related part |
|---|---|---|---|
| Power cord not connected correctly to the terminal block | Most common | Easy — check connection | Power cord |
| House fuse blown or circuit breaker tripped | Common | Easy — reset breaker/replace fuse | — |
| House power supply incorrect | Less common | Moderate — check supply | — |
| Power outage occurred | Occasional | Not applicable — wait for restoration | — |
How to Fix the nP Error, Step by Step
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Check the power supply and power cord connection
Confirm the power cord is properly connected to the terminal block — see the "Connecting electric dryers" section of the manual for the full instructions if you need to redo this.
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Reset the circuit breaker or replace the fuse
Do not increase the fuse capacity when replacing it. If the problem is a circuit overload rather than a simple trip, have it corrected by a qualified electrician rather than working around it.
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Confirm house power supply is correct
If the dryer needs a specific voltage/circuit configuration and the house supply doesn't match, that alone can trigger this code family even with everything else connected properly.
Which Models This Applies To
Documented for the LG DLEX3570/DLEX4270 electric dryer series. The display may show this fault as nP, PS, or PF depending on the exact condition, but all three point to the same power-supply diagnostic family — don't treat them as separate faults requiring different fixes.
See also: LG dryer tE1 · LG dryer d90.
Frequently Asked Questions
What does nP mean on an LG dryer?
A power supply problem — the power cord isn't connected correctly, house power is incorrect, or a fuse/breaker has tripped.
Are nP, PS, and PF different faults?
No — LG's documentation groups them together as the same power-supply error family, checked with the identical procedure.
Can I fix this myself?
Often yes — checking the power cord connection and resetting a tripped breaker or replacing a blown fuse are both DIY-level. If the problem is a circuit overload, that needs a qualified electrician rather than just a bigger fuse.
Is it safe to just install a higher-capacity fuse?
No — the documentation specifically warns not to increase fuse capacity. If a standard fuse keeps blowing, that points to an overload that needs proper electrical correction, not a bigger fuse.
Based on the LG DLEX3570 and DLEX4270 electric dryer service documentation. Last updated: .