LG · Dryer Serious
nP — No power detected at heater
nP indicates the main control sees no current flowing through the heater circuit when it should be energized. On 240V electric models this usually points at a power-supply problem rather than the element itself.
- Keep using it?
- Limited use only
- DIY difficulty
- Moderate
- Verified against
- lg.com ↗
How to fix it
- Unplug the dryer and shut off the 30A breaker.
- Test the outlet with a multimeter: ~240V across the two hots, ~120V from each hot to neutral.
- Remove the terminal cover and verify all three or four wires are tight on the block.
- If voltage and wiring are good, access the heating element and measure resistance — typically ~10 Ω; infinite means replace.
- Test the thermal fuse and high-limit thermostat for continuity; replace any open one and address the airflow restriction that caused the trip.
- Reassemble and verify heat returns on a Timed Dry cycle.
Why it happens
Typical signs: nP on display · Drum tumbles but stays cold · Recently installed or moved · Dryer working on a generator or sub-panel
- Only one 120V leg present Half of the 240V supply is missing — tripped half of a double-pole breaker, or one leg of the cord disconnected.
- Tripped breaker 30A double-pole breaker partially or fully tripped.
- Loose terminal block lug Cord wire backed out or terminal scorched.
- Open heating element Element coil failed open.
- Open high-limit / thermal fuse Safety device tripped from prior overheat event.
Parts you may need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
More LG dryer codes
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: lg.com.