2005 KitchenAid Dishwasher(Model#KUDI02FRSS1): The control panel console lock light was flashing continually after it washed awhile in the normal cycle, then when the cancel button was pushed, it would drain and then the lock light would start flashing again.
This is caused by a stuck key on the console control keypad assembly.
ERROR MESSAGES
STUCK KEY:
If the control detects that a key is stuck in the depressed position,
dishwasher operation will be suspended and the control will flash
the light for that key until the condition is corrected. If a key without
a light is stuck or multiple keys are stuck, the control will flash the
Lock-Out light.
I installed a new console control keypad assembly, worked great.
Black Console Part#8572494(Black)

White Console Part#8572495(White)

Stainless Console Part#8572496(Stainless)