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LG Dryer Error Code nP

Reviewed by the ApplianceErrors Editorial Team · Verified against manufacturer service documentation · Last verified: June 10, 2026
⚠ High Severity 🔧🔧🔧 Advanced DIY

No power to the heating element

The most common cause of the nP error on a LG dryer is tripped circuit breaker on the dryer's 240V circuit (~45% of cases); start with: check the circuit breaker.

💰 DIY cost: $0–$250 👨‍🔧 Pro cost: $200–$420 Save $200+ by doing it yourself
LG Dryer error code nP on the display panel
How the nP code appears on a LG dryer display

What Does Error Code nP Mean on a LG Dryer?

No power to the heating element.

The nP code fires when the control board confirms the dryer is running but senses no voltage reaching the heating element. Because electric dryers draw 240V across two breaker legs, losing one leg lets the 120V motor turn while the element stays cold, triggering the code. The board can't distinguish a tripped half-breaker from an open element, burned connector, or failed heater relay, so it reports the shared symptom rather than a specific component fault.

Models affected: Electric LG dryers with a 240V heating circuit, including models such as DLEX3900W, DLE3500W, DLEX4500B, and DLE7150W (gas models like DLG3601W heat differently and rarely display this code)
What owners report: Owners commonly report this appearing as clothes coming out damp despite the drum tumbling normally, and the most frequent quick win is resetting both switches of the double breaker since one side can trip silently. A partially seated or storm-affected breaker is a common false trigger before any real component has failed.

What Causes Error Code nP?

Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:

  1. 1
    Tripped circuit breaker on the dryer's 240V circuit 45% of cases
  2. 2
    Failed heater relay on main control board 30% of cases
  3. 3
    Burned wire or connector to heating element 15% of cases
  4. 4
    Failed heating element 10% of cases

How to Fix LG Dryer Error Code nP

🔧🔧🔧 Advanced DIY Est. time: 1–3 hours
⚡ Safety first: Unplug the appliance before opening any panels or touching internal components.
  1. 1

    Check the circuit breaker

    Electric dryers use a 240V circuit with two breaker switches. If one side trips, the dryer runs (motor works on 120V) but won't heat. Reset both breaker switches.

  2. 2

    Inspect the heating element wiring

    Check the wiring terminals at the heating element for burn marks or loose connections.

  3. 3

    Test the heating element

    Disconnect and check for continuity. Should read approximately 10–15 ohms.

    🔩 Multimeter
  4. 4

    Check control board relay

    If element and wiring are good, the relay that controls element power has failed.

    🔩 LG dryer control board ($100–$250)

How to Reset Error Code nP

Reset the circuit breaker first. If that doesn't resolve it, unplug dryer for 5 minutes and restart.

Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.

Full LG dryer reset guide → Enter diagnostic mode → Symptom guide: Dryer not heating →

Did this guide fix your appliance?

When to Call a Professional

Electrical faults (heater relays, control boards) require professional diagnosis if basic checks don't resolve the issue.

Average professional repair cost for this issue: $200–$420

Related Error Codes

F9
Thermistor failure — temperature sensor not reading
⚠ Medium Severity

Find Replacement Parts

Use these links to find the exact replacement parts for your LG Dryer:

🔩
Search PartSelect
LG Dryer repair parts
🔧
Search RepairClinic
Step-by-step video guides

External links — ApplianceErrors.com is not affiliated with these retailers.

More LG Dryer Error Codes

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Frequently Asked Questions

Can I keep using my LG Dryer when error nP appears? +
It is not advisable. The dryer may still power on, but running it while nP is active can worsen the heating fault or damage related parts. Treat it as a soon-as-possible repair.
What most commonly causes nP on a LG Dryer? +
Across reported LG dryer repairs, the most frequent is tripped circuit breaker on the dryer's 240V circuit (45% of cases), failed heater relay on main control board (30%), then burned wire or connector to heating element (15%). Check them in that order before replacing any parts.
nP keeps coming back after a reset — what should I check next? +
A reset only clears the stored nP fault; if it returns, the heating problem is still present. Move on to the physical checks — check the circuit breaker, then inspect the heating element wiring — since the code will reappear until the root cause is resolved. This is an advanced repair involving deeper disassembly or electrical testing.
How much does it cost to fix LG Dryer error nP? +
A DIY repair typically runs $0–$250 in parts, versus $200–$420 for a professional service call, so handling it yourself saves around $200. Expect the work to take 1–3 hours.
Which LG Dryer models show error nP? +
nP is documented on Electric LG dryers with a 240V heating circuit, including models such as DLEX3900W, DLE3500W, DLEX4500B, and DLE7150W (gas models like DLG3601W heat differently and rarely display this code). Other units sharing the same control platform can display it too, so the fixes here generally transfer across the series.

Sources & References

Content verified against manufacturer service documentation. Last verified: June 10, 2026.

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