What does LG dryer error code nP mean?

The nP error means no electrical current is reaching the dryer's heating element. The dryer spins but does not heat. The most common cause is a tripped double-pole circuit breaker — reset it fully. Also check the power cord, terminal block connections, and thermal fuse.

LG Dryer Error Code nP — No Power to Heater

Moderate Fix 15–30 minutes Tools: Multimeter, Screwdriver

What this means

The nP error code on LG electric dryers indicates that no current is being detected at the heating element. This means the dryer drum may spin but will not produce heat, resulting in damp clothes after a full cycle. The most common cause is a tripped circuit breaker — electric dryers require two 120V legs (240V total) from a double-pole breaker. If one leg trips, the motor runs but the heater does not receive power. Other causes include a faulty power cord connection, a blown thermal fuse, or a wiring issue at the electrical panel.

Alternate codes: NP

Step-by-step fix

4 steps

Check the circuit breaker

Go to your home's electrical panel and find the double-pole breaker for the dryer (usually 30 amps). Even if both switches look like they are in the 'ON' position, turn both off completely, wait 30 seconds, then turn them back on. A partially tripped breaker can supply enough power for the motor but not the heater.

Flip the breaker firmly to the full OFF position before turning it back ON. A breaker that is in a 'middle' position is tripped and needs a full reset.

Check the power cord and outlet

Unplug the dryer and inspect the power cord prongs for damage, burn marks, or bent pins. If possible, test the wall outlet with a multimeter — you should read 240V across the two hot terminals. If you read only 120V, one leg of the circuit is dead.

A loose connection at the dryer terminal block can also cause a single-leg power loss. Pull the dryer out and check the terminal block connections.

Inspect the terminal block

With the dryer unplugged, remove the terminal block cover on the back of the dryer. Check that all three (or four) wires are securely connected to the terminal block. Tighten any loose connections with a screwdriver.

Burn marks or melted plastic around a terminal indicate a loose connection that overheated. Replace the terminal block if damaged.

Check the thermal fuse and high-limit thermostat

If power supply is confirmed at 240V and connections are secure, the thermal fuse or high-limit thermostat may have blown. These safety devices cut power to the heater when the dryer overheats. Access the dryer's heating element housing and test both components with a multimeter for continuity.

A blown thermal fuse often indicates an underlying problem like a clogged vent. Always check and clean the exhaust duct before replacing the fuse.

When to call a professional

If the circuit breaker continues to trip, there may be a short circuit in the dryer wiring or the breaker itself may be failing. An electrician should inspect the dryer circuit. If the heating element is physically damaged, a technician should replace it.

Related error codes

The dryer is not receiving gas or has a power connection issue.

Advanced Fix · 30–60 minutes

The dryer is not receiving the correct electrical power.

Moderate Fix · 15–30 minutes

Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.

Learn more about our sources