LG WM3988H-A Series Manual page 54

Options
Options
When a cycle is selected, options like water temperature, spin
speed, are preset for that cycle, but they can be overridden by
selecting one of the option buttons on the control panel. For
example, selecting a COTTON/NORMAL cycle will automatically
default to a WARM wash, COLD rinse, HIGH spin speed, and
NORMAL soil level. Any of these settings may be overridden by
changing the options at the control panel before the wash cycle is
started.
Not every option is available for every cycle. As mentioned above,
the DELICATE cycle will lock out selections HOT WASH water,
HIGH spin speed, and STEAM in the cycle.
54 T-24
WM3988