DLEX3900W Error Codes — LG Dryer
🏷️ Model: DLEX3900W 📅 Production: 2019–2022 🌀 Type: Dryer
7.4 cu ft TurboSteam dryer. The D80/D90/D95 airflow-blockage family is by far the most common code group on this model — almost always lint restriction in the duct run.
Most Common Codes on the DLEX3900W
D80 D90 D95 nP tE1
Duct blockage detected — exhaust duct 80% blocked
⚠ Medium Severity Duct blockage detected — exhaust duct 90% blocked
⚠ High Severity Duct blockage detected — exhaust duct 95% blocked
⚠ High Severity No power to the heating element
⚠ High Severity Thermistor error — air temperature sensor out of range
⚠ Medium Severity All Other LG Dryer Codes
The DLEX3900W can also display any of the standard LG dryer codes:
F9 Thermistor failure — temperature sensor not reading CL Child lock is active — controls are locked D75 Exhaust duct ~75% blocked — airflow restriction warning PS Power supply error — improper voltage at the cord or terminal block dE Door error — dryer door not fully closed tE3 Thermistor error — drying temperature sensor out of range tE4 Thermistor error — secondary/outlet temperature sensor fault HS Humidity sensor error — moisture sensing failure GAS Gas supply error — no gas detected (gas dryer models only) dH High temperature error — drum temperature exceeded safe limit PF Power failure — cycle interrupted nF No heat / airflow fault — dryer runs but cannot maintain heating E2 Control board error — internal board fault detected on power-up or mid-cycle E3 Motor or board sensing error — drum motor not detected running tCL Tub clean reminder — time to clean the drum and condenser (not a fault)
💡 Tip: Your model's serial sticker (door frame, rim, or back panel) confirms the exact
model number. Codes can differ between revisions of the same model line — if a code on your display
isn't listed here, check the
full LG dryer code list.