Whirlpool documents LOC or LC as an active Control Lock state, so the first check is the model control rather than parts replacement.
Front Load Washer; United States. This page is not a brand-wide diagnosis.
The washer display may show LOC or LC and the controls may not accept normal cycle input while the lock state is active.
Stop pressing random controls if the model-specific Control Lock instruction is unclear or the display remains locked after the documented action.
Record the model label, exact LOC or LC display, button sequence tried, and whether the panel responds to other buttons.
This symptom page is attached to Front Load Washer. It is not a brand-wide diagnosis.
For Whirlpool front-load washers, LOC or LC is documented as Control Lock being activated, with Whirlpool directing users to the Control Lock button or the owner manual on older models.