WM2901HVA - LG Washing Machine Service Manual (repair manual). Page 14

• STEAM: Use the STEAM button to add steam to the cycle for the extra cleaning.
• WASH/RINSE OPTIMIZER: Use the WASH/RINSE OPTIMIZER button to select the water level, and 

detergent mount automatically by the smart sensor & program.

• PRE WASH: Use the PREWASH button to select to wash temporary before to start the course which you chosen.
• CUSTOM PGM:  Use the CUSTOM PGM button to select the course that you has been saved by “PGM SAVE”.
• DELAY WASH: Once you have selected the cycle and other settings, press this button to delay the start of the wash cycle.
• TUB CLEAN:  A buildup of detergent residue can occur in the wash tub over time and can lead to mideway or musty smell.
• RINSE+SPIN: Select this option to rinse and spin a load separately from a regular cycle.

• Select a water temperature based on the type of load you are washing. 
• To change the spin speed, press the Spin Speed button repeatedly to cycle through available options.
• To change the soil level, press the Soil Level button repeatedly until the desired setting is on.
• Press repeatedly to adjust the volume of the Beeper.