Will not turn off

Dishwasher Repair
1

Brand: LG
Model Number: LDS4821BB ABPEEUS
Main Symptom: Stays on
What happens & when: After completing all cleaning and drying cycles it will not shut off. It makes a low humming sound and still feels warm to the touch hours later. Could this be the control board inside? If so, what is the part number? I have to leave the door open or shut it off at switch box.

Error Code (if any):
Parts or tests already tried:
Photos / video link:

2

It sounds like the main control may have a relay stuck closed. EBR33469404 Main Control Board (Power Pcb Assembly) | Genuine Lg OEM In Stock