LG · Dryer
LG Dryer CL Error Code
Child lock is active—not a fault
What this error means
CL displays Child Lock engaged. The control panel buttons are disabled to prevent accidental cycle changes—this is intentional, not a malfunction.
How CL is detected
When CL appears on a LG dryer, the control board has confirmed that water did not leave the machine within the programmed drain window. On LG DLEX3900W, LG DLEX4000W, and similar variants, the drain pump runs for a fixed interval—often three to seven minutes on washers and dishwashers—while a pressure switch or turbidity sensor verifies the tub or sump is empty. If water remains, the cycle stops to prevent spin with a full tub or overflow on the next fill.
Most CL calls are resolved without parts: press and hold the child lock or rack dry button for three seconds until cl clears. Restricted drain paths mimic pump failure because the impeller spins against a blocked hose or filter. Document whether the pump hums audibly during the drain step; a humming pump with no water movement points to a clogged filter or kinked hose, while silence may indicate a failed pump motor or loose wiring at the harness.
After clearing blockages, run a short cycle and listen at the drain hose for steady water flow. If CL returns on the next load with a clean filter and straight hose, measure resistance at the pump motor connector per the service manual for your model before ordering a replacement pump assembly.
Common causes
- Child Lock enabled by holding two buttons per manual
- SmartThinQ app lock turned on remotely
- Control lock after cleaning the panel while pressing buttons
- Factory default lock setting on display demo units mistakenly left enabled
Step-by-step fixes
- 1Press and hold the Child Lock or Rack Dry button for three seconds until CL clears
- 2Check the SmartThinQ app for an active control lock toggle
- 3Refer to the button icon chart on the panel bezel for your model's exact combo
- 4Unplug two minutes only if the lock combo is unknown—note this resets some settings
When to call a technician
No service needed for CL alone—only if buttons remain dead after lock is cleared.
Affected models
- LG DLEX3900W
- LG DLEX4000W
- LG DLE3400W
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use dryers to prevent CL from lint and food debris buildup.
- Record when CL appears in the cycle and whether it clears after a 60-second power reset on your LG dryer—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for CL; LG uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting CL; reversed plugs on pumps and valves cause immediate repeat faults.