LG dryer error codes identify specific problems using alphanumeric displays or blinking lights. The most common are FlowSense vent warnings (d80, d90, d95), temperature sensor errors (tE1-tE4), and humidity sensor issues (HS). Most codes clear with a factory reset or basic maintenance like cleaning the lint filter and exhaust vent.
LG dryers display error codes on digital panels, through blinking LED patterns, or via the ThinQ app. This guide covers all verified error codes for electric, gas, and heat pump models—with particular attention to the FlowSense vent blockage system unique to LG.
Identify Your LG Dryer Model
Your model number determines which codes apply and how they display:
| Prefix | Dryer Type | Voltage | Key Differences |
|---|---|---|---|
| DLE/DLEX | Electric | 240V, 30-amp | Most common; uses heating element |
| DLG/DLGX | Gas | 120V, 15-amp | Has gas valve; gAS/9A5 code applies |
| DLHC | Heat Pump | 120V | Ventless; E13 drain code applies |
| WKEX/WKGX | WashTower | Varies | Stacked unit; same codes as standalone |
Find your model number inside the door frame or on the back panel.
Display Types
- Digital LED displays: Show alphanumeric codes like d80, tE1, HS
- LED indicator models: Use blinking light patterns (count blinks = error number)
- ThinQ-enabled models: Display codes on dryer AND send smartphone notifications
Error Code Quick Reference
| Code | Meaning | Severity | Quick Action |
|---|---|---|---|
| d75 | 75% vent blockage | Low | Schedule vent cleaning |
| d80 | 80% vent blockage | Medium | Clean vent system |
| d90 | 90% vent blockage | High | Stop using; clean immediately |
| d95 | 95% vent blockage | Critical | Fire hazard; professional cleaning |
| tE1 | Main thermistor error | Medium | Factory reset |
| tE2 | Outlet thermistor error | Medium | Check exterior vent for ice |
| tE3 | Exhaust thermistor error | Medium | Factory reset |
| tE4 | Thermistor error 4 | Medium | Factory reset |
| HS | Humidity sensor error | Medium | Clean sensor bars |
| nP | No power to heater | High | Check 240V supply |
| gAS/9A5 | No gas supply | High | Check gas valve |
| dE | Door not closed | Low | Close door firmly |
| LE | Motor locked | High | Check for obstructions |
| PS | Power cord wiring error | High | Check terminal block |
| PF | Power failure | Low | Restart cycle |
| E13 | Drain error (heat pump) | Medium | Check drain hose |
| dHE | Heat pump error | High | Service required |
| CL | Child lock active | Info | Hold Child Lock 3 sec |
FlowSense Vent Blockage Codes (d75-d95)
FlowSense is LG’s proprietary system that monitors exhaust airflow. These codes are unique to LG and represent the most commonly searched dryer error codes.
How FlowSense Works
Sensors measure backpressure and temperature in the exhaust system. When lint restricts airflow, heat builds up and triggers progressive warnings.
FlowSense Bar Indicators
| Indicator | Meaning |
|---|---|
| No bars | Airflow normal |
| 2 bars | Moderate restriction—clean soon |
| 4 bars | Severe blockage—clean immediately |
d80 — 80% Duct Blockage
The dryer detects significant lint buildup but continues operating inefficiently.
Symptoms: Long drying times, clothes still damp, dryer exterior hot
Fix: Clean lint filter, check exhaust hose for kinks, clean exterior vent
Gas dryer note: On DLG/DLGX models, d80 may indicate lack of gas supply rather than duct blockage.
d90 — 90% Duct Blockage
Severe restriction detected. Dryer enters cool-down mode and stops.
Action: Stop using dryer until vent system is professionally cleaned.
d95 — 95% Duct Blockage (CRITICAL)
Fire hazard. Near-complete blockage requiring immediate attention.
Action: Do NOT operate. Unplug immediately. Have entire system professionally cleaned.
See: LG Dryer FlowSense Error: d80, d90, d95 Fix
Heating Error Codes
tE1, tE2, tE3, tE4 — Thermistor Errors
These codes indicate temperature sensor issues. Most clear with a factory reset.
| Code | Sensor Location | Common Cause |
|---|---|---|
| tE1 | Main thermistor | Power surge, loose wiring |
| tE2 | Outlet thermistor | Cold air entering vent (winter) |
| tE3 | Exhaust thermistor | Communication error |
| tE4 | Additional sensor | Same as tE1/tE3 |
Fix: Factory reset first. If code persists, thermistor may need replacement (Part #6323EL2001B, tests 10-11k ohms at 77°F).
See: LG Dryer tE Error: Temperature Sensor Fix
HS — Humidity Sensor Error
Important: HS means Humidity Sensor, NOT “Heater Short”—this is a common misconception.
The moisture sensor bars inside the drum have buildup from fabric softener or dryer sheets, causing the dryer to default to 2.5-hour cycles.
Fix: Locate two curved metal bars below the lint filter. Clean with soft cloth, warm water, and mild soap. Wipe 4-5 times per bar.
See: LG Dryer HS Code: Humidity Sensor Cleaning
nP — No Power to Heater
The dryer receives partial power (120V for motor/display) but not full 240V for heating.
Symptoms: Drum spins, lights work, no heat. Code appears 5-20 minutes into cycle.
Fix: Check power cord connection, reset circuit breaker, verify 240V at outlet.
Warning: 240V can be lethal. Have a licensed electrician verify outlet if unsure.
See: LG Dryer nP Code: No Heat Fix
Gas Dryer Codes
gAS / 9A5 — No Gas Supply
Note: The “9A5” display spells “GAS” using alphanumeric characters.
The gas dryer is not receiving gas supply.
Common causes: Gas valve turned OFF, kinked line, gas service interrupted
Fix:
- Locate gas valve (usually behind dryer)
- Verify valve is fully OPEN (handle parallel to pipe)
- Check line for kinks
- Verify other gas appliances work
If you smell gas: Leave immediately. Do not operate any electrical switches. Call your gas company from outside. Never use open flame to check for leaks.
See: LG Gas Dryer gAS/9A5 Code Fix
Door and Motor Errors
dE — Door Error
Door is not completely closed or latched.
Fix: Check lint filter is pushed fully in, remove clothing from seal, close door firmly until click heard.
See: LG Dryer dE Door Error Fix
LE — Motor Locked
Motor unable to turn drum due to overload or obstruction.
Fix: Unplug for 30 minutes to cool motor, reduce load size, manually rotate drum to check for obstructions.
Heat Pump Model Codes (DLHC Series Only)
These codes apply ONLY to LG heat pump/ventless dryers (DLHC series):
E13 — Drain Error
The drain hose is kinked, crushed, clogged, or frozen.
Fix: Inspect drain hose for kinks, clear clogs, allow sump to thaw if frozen.
dHE — Dual Inverter Heat Pump Error
Indicates heat pump system malfunction. Professional service typically required.
See: LG Heat Pump Dryer Error Codes
Electrical and Control Errors
PS — Power Supply/Cord Wiring Error
Power cord wired incorrectly at terminal block. Common with new installations.
Terminal block wiring: White=center, Black=left, Red=right, Green=ground
Warning: Electrical hazard. Ensure power OFF at breaker before checking.
PF — Power Failure
Power was interrupted during operation. Restart the cycle.
If PF occurs repeatedly without actual outages, have electrical system inspected.
AE — Communication Error
Internal communication failure between control boards. Professional service typically required.
Confidence: LOW—limited official documentation; varies by model.
Status Indicators (NOT Errors)
| Display | Meaning | Action |
|---|---|---|
| CL | Child Lock active | Hold CHILD LOCK button 3-5 seconds |
| End | Cycle complete | Remove clothes |
| Cd | Cool down phase | Normal; wait or press any button |
Important: CL means “Child Lock,” NOT “Check Lint”—this is a common misconception. The Check Filter reminder is a separate blinking indicator light.
How to Reset Your LG Dryer
Standard Reset
- Press POWER to turn dryer OFF
- Unplug or trip circuit breaker
- Wait 5 seconds
- Restore power and test
Factory Reset (Hard Reset)
- Trip circuit breaker AND unplug dryer
- While disconnected, press and hold POWER/START for 5 seconds
- Press and hold PLAY/PAUSE for 5 seconds
- Restore power and test
FlowSense Reset
FlowSense codes (d75-d95) automatically clear once blockage is removed. If codes persist after cleaning, perform factory reset.
Vent Requirements
Proper venting prevents FlowSense errors and fire hazards.
Maximum Duct Lengths (4-inch diameter)
| 90° Elbows | Maximum Length |
|---|---|
| 0 | 65 ft |
| 1 | 55 ft |
| 2 | 47 ft |
| 3 | 36 ft |
| 4 | 28 ft |
Rule: Deduct 6 feet per 90° elbow. Maximum 4 elbows allowed.
Prohibited Configurations
- Plastic or vinyl ducting (fire hazard)
- Thin foil ducting (crushes easily)
- Screens over exterior vent (clogs with lint)
- Flexible metal duct longer than 8 feet
See: LG Dryer Vent Requirements
Fire Safety
Dryer vent fires are a serious risk:
- ~15,000 dryer fires annually in the US
- 34% caused by lint buildup in vents
- Peak: January, 1-2 PM
Warning signs:
- Clothes take longer to dry
- Dryer exterior unusually hot
- Burning smell during operation
- Exterior vent flap doesn’t open
Maintenance: Clean lint filter after every load. Professional vent cleaning at least annually (every 6-9 months for heavy use).
When to Call a Professional
Contact LG support (1-800-243-0000) or a technician if:
- d90 or d95 codes appear (fire hazard)
- Gas smell detected (leave immediately, call from outside)
- Codes persist after factory reset and cleaning
- nP code with verified 240V supply (heating element failure)
- Any burning smell or sparking
- Heat pump codes (E13, dHE) after basic troubleshooting
Diagnostic Mode
For advanced troubleshooting, LG dryers have a diagnostic/test mode that cycles through component tests.
Sources
For official LG support:
Other LG Appliances
- LG Washing Machine Error Codes: Complete Guide
- LG Refrigerator Error Codes: Complete Guide
- LG Dishwasher Error Codes Explained