LG DLEX3900W dryer will not connect to Wi-Fi
Cause 1 of 4The Wi-Fi password was entered incorrectly. Source: Troubleshooting: Wi-Fi, p. 55
First checkDelete the home Wi-Fi network from the phone and start the connection again.
Causes and checks
The Wi-Fi password was entered incorrectly. Source: Troubleshooting: Wi-Fi, p. 55
- Delete the home Wi-Fi network from the phone and start the connection again.
Mobile data is on in the smartphone. Source: Troubleshooting: Wi-Fi, p. 55
- Turn off mobile data on the phone before connecting the dryer.
The router is not on 2.4 GHz. Source: Troubleshooting: Wi-Fi, p. 55
- Set the router to 2.4 GHz. The dryer supports only that frequency.
The dryer is too far from the router. Source: Troubleshooting: Wi-Fi, p. 55
- Move the router closer or add a Wi-Fi repeater.
All 4 causes checked. Contact LG Customer Information Center: 1-800-243-0000.
Service
If the checks above do not clear it, 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
Other DLEX3900W 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.
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.