LG DLEX3900W and DLEX4000W steam dryers
- Category
- Dryers
- Model number
- DLEX3900W, DLEX3900B, DLGX3901W, DLGX3901B, DLEX4000W, DLEX4000B, DLGX4001W
- Region
- United States and Canada
- Verified
- Rating label
- At the top of the door opening, on a silver label visible with the door open. Source: support page
- D80, d90, d95
- Flow Sense
- TE1 to tE7
- Error Ps
- BIG
- CL
- Dryer does not heat
- Dryer will not turn on
- Clothes take too long to dry
- Damp spots after a Sensor Dry cycle
- Lint on clothes
- Clothes are wrinkled
- Static in clothes after drying
- Steam does not generate and no error code is shown
- Unpleasant odor from the dryer
- Dryer will not connect to Wi-Fi
- How to clean the lint filter
- How to turn off Control Lock on the DLEX3900W
- How to turn off Control Lock on the DLEX4000W
- How to save a custom program on the DLEX3900W
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Error codes
| Code | Meaning | Checks |
|---|---|---|
| d80, d90, d95 | The exhaust system is restricted: too long, too many turns, or blocked. LG says not to use the dryer until the exhaust system is cleaned or repaired. | 4 causes |
| Flow Sense | The dryer has detected a restriction in the outside exhaust duct. The dryer still runs, but drying takes longer and uses more energy. | 4 causes |
| tE1 to tE7 | Temperature sensor failure. | Checks |
| Ps | The power cord is connected incorrectly. | Checks |
| bIG | Not a fault. The steam option is set for a big item such as a comforter, because the More Time button was pressed. | Checks |
| CL | Not a fault. Control Lock is on, so every button except Power is locked. The door is not locked. | Checks |
tE1 to tE7
tE1, tE2, tE3, tE4, tE5, tE6 or tE7 in the display. Temperature sensor failure.
A temperature sensor has failed. Source: Troubleshooting: Error Messages, p. 51
- Turn off the dryer.
A temperature sensor has failed. Source: Troubleshooting: Error Messages, p. 50
- Turn off the dryer.
Ps
Ps in the display. The power cord is connected incorrectly.
The power cord is connected incorrectly at the terminal block. Source: Troubleshooting: Error Messages, p. 51
The power cord is connected incorrectly at the terminal block. Source: Troubleshooting: Error Messages, p. 50
bIG
bIG in the display. Not a fault. The steam option is set for a big item such as a comforter, because the More Time button was pressed.
- Press the Less Time button to reduce the load size shown.
CL
CL alternating with the remaining time. Not a fault. Control Lock is on, so every button except Power is locked. The door is not locked.
Control Lock is on. Source: Operation: Control Lock, p. 42
- Turn the dryer on and hold the Wrinkle Care button for 3 seconds. A chime sounds and the remaining time returns to the display.
Control Lock is on. Source: Operation: Control Lock, p. 42
- Turn the dryer on and hold the Damp Dry Signal button for 3 seconds. A chime sounds and the remaining time returns to the display.
Problems
- Dryer does not heat4 causes in the manual. First: A house fuse is blown, a circuit breaker has tripped or the power is out.
- Dryer will not turn on2 causes in the manual. First: the power cord is not plugged in firmly.
- Clothes take too long to dry4 causes in the manual. First: the exhaust duct is blocked, dirty or too long, or the outside wall damper is blocked.
- Damp spots after a Sensor Dry cycleThe load is very large, very small, or a single large item such as a blanket or comforter.
- Lint on clothes3 causes in the manual. First: the lint filter is not clean.
- Clothes are wrinkled2 causes in the manual. First: the clothes were overdried.
- Static in clothes after drying3 causes in the manual. First: fabric softener is missing or used incorrectly.
- Steam does not generate and no error code is shownWater level error.
- Unpleasant odor from the dryer2 causes in the manual. First: the dryer is new. The rubber inside gives off an odor.
- Dryer will not connect to Wi-Fi4 causes in the manual. First: the Wi-Fi password was entered incorrectly.
Damp spots after a Sensor Dry cycle
The load is very large, very small, or a single large item such as a blanket or comforter. Source: Troubleshooting: Performance, p. 54
- Use a Time Dry cycle for very small loads.
- For one bulky item, pause the cycle once or twice and rearrange the item so damp areas are exposed.
- To finish a few damp items after a sensor cycle, empty the lint filter and run a Time Dry cycle.
Steam does not generate and no error code is shown
Water level error. Source: Troubleshooting: Steam Functions, p. 54
Drying time varies from load to load
Heat settings, load size and the dampness of the clothes differ between loads. LG lists load size, fabric type, wetness and lint filter condition as the factors, and says an unbalanced load in the washer can leave clothes wetter, so they take longer to dry. Source: Troubleshooting: Operation, p. 53
Dryer starts by itself every few minutes after the cycle
Wrinkle Care is on. It runs the dryer briefly every few minutes for up to 3 hours after the cycle ends. Source: Troubleshooting: FAQs, p. 50
Display shows 3 minutes on the Steam Fresh cycle
Before the cycle starts, the display shows the recommended number of garments, not the time. The More Time and Less Time buttons change the load size, and the bIG setting is for a large load or a single bulky item. Source: Troubleshooting: FAQs, p. 50
How-to
- How to clean the lint filterAfter every cycle, and when drying takes longer than usual.
- How to turn off Control Lock on the DLEX3900WWhen the buttons beep and nothing happens, or CL shows in the display.
- How to turn off Control Lock on the DLEX4000WWhen the buttons beep and nothing happens, or CL shows in the display.
- How to save a custom program on the DLEX3900WTo reuse a combination of settings.
Maintenance
| Task | When | Source |
|---|---|---|
| Clean the lint filter | After every cycle | Source: Maintenance: Cleaning the Lint Filter, p. 48 |
| Check the vent ductwork for lint buildup | Once per month | Source: Maintenance: Maintaining Ductwork, p. 48 |
| Clean the vent ductwork. If airflow or drying performance drops noticeably, check the ductwork for blockages straight away and contact a qualified technician or service provider. | At least once per year | Source: Maintenance: Maintaining Ductwork, p. 48 |
| Wipe around the door opening and seal with a soft, damp cloth to prevent lint and dust buildup that could damage the door seal | Source: Maintenance: Cleaning the Interior, p. 48 | |
| Vacuum lint and dust from around and under the dryer | Regularly | Source: Maintenance: Cleaning Around and Under the Appliance, p. 48 |
Settings
| Setting | Options | Default | Notes | Source |
|---|---|---|---|---|
| Control Lock (DLEX3900W) | Hold the Wrinkle Care button for 3 seconds with the power on | Locks every button except Power. The door is not locked. Power off does not reset it. | Source: Operation: Control Lock, p. 42 | |
| Control Lock (DLEX4000W) | Hold the Damp Dry Signal button for 3 seconds with the power on | Locks every button except Power. The door is not locked. Power off does not reset it. | Source: Operation: Control Lock, p. 42 | |
| Energy Saver (DLEX3900W) | Hold the Energy Saver button for 3 seconds to switch the default on or off; ON or OFF appears in the display | On for the Normal cycle | Starts the Normal cycle with an air dry section and lengthens drying time. | Source: Operation: Energy Saver, p. 42 |
| Energy Saver (DLEX4000W) | On or Off | On for the Normal cycle | Starts the Normal cycle with an air dry section and lengthens drying time. Turning it off changes the default cycle to the last cycle used. | Source: Operation: Energy Saver, p. 42 |
| Drum light (DLEX4000W) | Hold the Wrinkle Care button for 3 seconds during the cycle | On when the dryer is turned on | The white LED goes out when the door is closed and the cycle starts. The held button turns it on for 4 minutes. | Source: Operation: Drum Light, p. 42 |
| Wrinkle Care | Press the button before starting a cycle | Tumbles the load periodically for up to 3 hours after the cycle, or until the door is opened. Only Power works after the cycle ends. | Source: Operation: Wrinkle Care, p. 42 | |
| Damp Dry Signal | Press the button before starting a cycle | Signals when the load is about 80% dry, for items to iron or hang while slightly damp. | Source: Operation: Damp Dry Signal, p. 43 | |
| Time Dry | 20 to 60 minutes in 10-minute steps; More Time and Less Time change it in 1-minute steps | High temperature | Manual drying time for small loads or removing wrinkles. The dry level cannot be adjusted. | Source: Operation: Cycle Modifiers, p. 40 |
| Reduce Static | Press the button, then More Time or Less Time to match 7, 9, 11, 14, 16 or 18 items | Injects steam late in the cycle. The Damp and Less dry levels cannot be selected with it. | Source: Operation: Reduce Static, p. 41 | |
| Wi-Fi connection (DLEX3900W) | Hold the Damp Dry Signal button for 3 seconds | Starts pairing with the LG ThinQ application. | Source: Operation: Control Panel, p. 34 | |
| Wi-Fi connection (DLEX4000W) | Hold the Reduce Static button for 3 seconds | Starts pairing with the LG ThinQ application. | Source: Operation: Control Panel, p. 34 |
Specifications
Steam dryers with a Flow Sense duct blockage indicator, sensor dry cycles and TurboSteam, Reduce Static and Wrinkle Care options. Each manual covers electric and gas versions, and both are 27 in (68.6 cm) wide with a 7.4 cu ft drum. Source: Product Features; Product Specifications, pp. 8-9
The dryer displays tE1 through tE7, Ps and d80, d90 or d95. d80, d90 and d95 mean the exhaust system is too long, has too many turns or is blocked, and LG says not to use the dryer until it is cleaned or repaired. Source: Troubleshooting: Error Messages, p. 51
The Flow Sense indicator stays lit for 2 hours after a cycle when it detects restricted venting. After the restriction is cleared it takes several consecutive cycles to reset. Source: Troubleshooting: Operation, p. 51
| Drum capacity | 7.4 cu ft; 22.5 lb (10.2 kg) on the Normal cycle and 8 lb (3.6 kg) on a steam cycle | Source: Product Specifications, p. 9 |
|---|---|---|
| Dimensions (W x D x H) | 27 x 30 1/8 x 39 in (68.6 x 76.5 x 99 cm); 51 3/8 in (130.5 cm) deep with the door open | Source: Product Specifications, p. 9 |
| Net weight, DL*X390** | Gas 123.02-126.77 lb (55.8-57.5 kg); electric 120.15-123.46 lb (54.5-56 kg) | Source: Product Specifications, p. 9 |
| Net weight, DL*X400** and DL*X408** | Gas 132.28-139.34 lb (60.0-63.2 kg); electric 121.9-125.3 lb (55.3-56.8 kg) | Source: Product Specifications, p. 10 |
| Water pressure | 20-120 psi (138-827 kPa) | Source: Product Specifications, p. 9 |
| Gas supply pressure (gas models) | Natural gas 4-10.5 inches water column (10.2-26.7 cm); LP 8-13 inches water column (20.4-33.1 cm) | Source: Product Specifications, p. 9 |
| Electrical (electric models) | A separate 240 VAC, 60 Hz, single-phase circuit fused at 30 amperes, fused on both sides of the line. The manual refers to the rating label for details. | Source: Installation: Connecting Electric Dryers, p. 22 |
Recalls
No exact-model match for DLEX3900W, DLEX4000W in the U.S. Consumer Product Safety Commission recall database, checked . Recalls can name model families, so also check current recalls for LG.
Service contact
LG Customer Information Center: 1-800-243-0000, lg.com/us/support. United States (Canada: 1-888-542-2623). Source: Limited Warranty: To Obtain Warranty Service, pp. 58, 64
Sources
- Owner's Manual, Dryer DL*X390**. LG Electronics Inc. Document MFL70442672, revision Rev.00, 2024-02-26, 64 pages, en-US. gscs-b2c.lge.com. Listed on the manufacturer's support page. Retrieved 12 November 2026.
- Owner's Manual, Dryer DL*X400** / DL*X408**. LG Electronics Inc. Document MFL70442676, revision Rev.02, 2026-06-25, 60 pages, en-US. gscs-b2c.lge.com. Listed on the manufacturer's support page. Retrieved 12 November 2026.
Page numbers are the numbers printed in the manual. Where this page and the manual differ, follow the manual.
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