Close the door of the washer with the power switched off. This is the first step in activating the diagnostic mode.
Press the "Control On" button and select the "Drain/Spin" cycle via the cycle selector dial.
Depress the "Spin Select" button until "No Spin" is selected.
Push the "Prewash" or "Rinse/Hold" button four times within five seconds. "C:00" will appear on the display when the diagnostic mode is running; the appliance will automatically begin to run through the checks.