How do I enter diagnostic mode on my Whirlpool washer?

Entering the automatic diagnostic test mode on a modern electronic Whirlpool top-load washing machine involves executing a precise program dial rotation sequence. First, ensure the machine is plugged in, the drum is empty, and the program dial is pointed straight up at the twelve o'clock starting position. Second, rotate the dial counterclockwise one click, clockwise three clicks, counterclockwise one click, and clockwise one final click. Third, observe the console indicator lights; when all cycle status lights flash simultaneously, you have successfully entered diagnostic mode. You can troubleshoot control responses easily using this sequence. You can verify that your entry is successful when the console lights illuminate correctly, allowing you to run automated error code checks and individual component tests safely.