Lg dryer error code d80

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.

Cause 1 of 4The exhaust system is too long or has too many turns or restrictions. Source: Troubleshooting: Error Messages, p. 51

First checkStop using the dryer until the exhaust system has been cleaned or repaired. LG warns that severely restricted exhaust is dangerous and could cause a fire or other property damage.

Causes and checks

The exhaust system is too long or has too many turns or restrictions. Source: Troubleshooting: Error Messages, p. 51
1. Stop using the dryer until the exhaust system has been cleaned or repaired. LG warns that severely restricted exhaust is dangerous and could cause a fire or other property damage.
2. Run the dryer and check the outside vent for strong airflow.
Qualified technician If the exhaust system is extremely long, have it repaired or rerouted.
The house exhaust system is blocked. Source: Troubleshooting: Error Messages, p. 51
1. Keep the area around the dryer clean and free of clutter.
2. Check the vent hood for damage or lint clogging, and keep the area around the hood clear.
The exhaust system is too long or has too many turns or restrictions. Source: Troubleshooting: Error Messages, p. 50
1. Stop using the dryer until the exhaust system has been cleaned or repaired. LG warns that severely restricted exhaust is dangerous and could cause a fire or other property damage.
2. Run the dryer and check the outside vent for strong airflow.
Qualified technician If the exhaust system is extremely long, have it repaired or rerouted.
The house exhaust system is blocked. Source: Troubleshooting: Error Messages, p. 50
1. Keep the area around the dryer clean and free of clutter.
2. Check the vent hood for damage or lint clogging, and keep the area around the hood clear.

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 codes

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.
tE1 to tE7: Temperature sensor failure.
Ps: The power cord is connected incorrectly.
bIG: Not a fault. The steam option is set for a big item such as a comforter, because the More Time button was pressed.
CL: Not a fault. Control Lock is on, so every button except Power is locked. The door is not locked.

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.

Applies to: DLEX3900W (variants DLEX3900B; DLGX3901W; DLGX3901B), DLEX4000W (variants DLEX4000B; DLGX4001W). United States and Canada.
Source: Owner's Manual, Dryer DL*X390**, MFL70442672 revision Rev.00, 2024-02-26; Owner's Manual, Dryer DL*X400** / DL*X408**, MFL70442676 revision Rev.02, 2026-06-25
Last verified: 12 November 2026
Handbook: LG DLEX3900W and DLEX4000W steam dryers in Dryers; all LG handbooks