WM2601HW - LG Washing Machine Service Manual (repair manual). Page 18

5-3. SPECIAL FUNCTIONS

The option buttons also activate special functions, including CHILD LOCK, DRUM LIGHT, TUB CLEAN, and
LANGUAGE. Press and hold the option button marked with the special function for 3 seconds to activate.

Use this option to prevent unwanted use of the washer or to keep cycle settings from being
changed while the washer is operating. Press and hold the PREWASH button for 3 seconds
to activate or deactivate CHILD LOCK. CHILD LOCK will be shown in the display, and all
controls are disabled except the ON/OFF button. The washer can be locked during a cycle.

The drum is equipped with a blue LED light that illuminates when the washer is turned on. 
This light automatically turns off when the door is closed and the cycle starts. To turn on the
light during a cycle, press and hold the RINSE+SPIN button for 3 seconds. The drum light
will illuminate and then turn off automatically after 4 minutes.

A buildup of detergent residue can occur in the wash tub over time and can lead to a mildew
or musty smell. The TUB CLEAN cycle is specially designed to remove this buildup. Press
and hold the EXTRA RINSE button for 3 seconds to activate this cycle. The display will show
a message to add liquid bleach to the dispenser. After the cycle has ended, open the door
and allow the drum interior to dry completely. NOTE: Do NOT use this cycle with clothes, and
do NOT add detergent or fabric softener.