Dishes not getting clean and soap dispenser not working

Multiple repair starting with the soap dispenser door not openning or openning late. Fixed with the door motor kit. Don't buy just the motor! The instruction sheet is NO GOOD! Assembled unit with help of the photos and refering to the wiring diagram in the manual. Also found debris in the rotating arms. Cleaned those. A small shop vac was indispensible. Next noticed that the heating element was not being covered with water. I removed the water inlet valve and determined that rust had seized the piston. Replaced that and the dish washer is working like new. Next time- Replace the water inlet valve first!