It would appear you have a direct short circuit in a wire or component.
Check all wires to ground.
Replace the fuse.
Unplug the drain pump,motor and water valve.
Check the ohms on these parts.
If they are in spec and not grounded then start the cycle.
Plug up one at a time starting in sequence with the drain pump then water valve then motor as each one comes up on the timer sequence to see which is blowing the fuse.