The door to my Kitchenaid dishwasher lost a spring. It will fall to the 100% open position. When you close it, the spring does not help it back up. Where is the spring? How do I get a diagram to see how to fix this? thanks.

Falls open when? This unit wom't operate unless the door is secure so I assume you mean the door assist springs are disconnected or broken and the door just falls heavily to the open position after you unlatch it from the closed position. Try these, part 18 here

http://www.searspartsdirect.com/partsdirect/part-model/Kitchenaid-Parts/Dishwasher-Parts/Model-KUDI01FLSS3/0593/0130000/W0503111/00007

should attach to frame in an easy to distinguish hole or slot and to door hinges, number 2 here

http://c.searspartsdirect.com/lis_png/PLDM/W0503111-00001.png

I experienced the same problem after my tension cables broke. The door fell open with such force that it bent the hinges a little. If you've replaced the tension strings (which you should do every 5-8 years) then you don't have to replace the latch. I did and it didn't solve the problem.
Here's the solution:
Put a towel at the bottom of each side of the door by the hinge.
Push the door closed a couple of times to bend back the hinges.
Remove the towels and you're back in action.
Good luck

Broken spring.

on most all dishwashers on the very bottom on each side is a pulley like system with two springs one for each side along with a small piece of rope or cord that stretches the spring open and closed as you open and close the door if your door is falling opened most likely you would have to replace these lower pulleys as well as the springs what is the model number of your machine if you have any further questions please message me back and thanks again for using fixya please also note this fix is on most all dishwashers i am currently not able to see your model number so i cannot specify exactly for your machine Thanks again Rick

there is springs on left and right side held by string and spring. one is broken.letme know how it turned out.

yep you can just get springs from lowes or home dept or your local hardware store; they're often in with the hardware (i.e., screws) and not plumbing. remember that the springs need to stretch out a bit, too; so you may end up buying springs that look shorter than they should, but they eventually habituate.

OK, pretty easy fix. Look at diagram 10 here: http://www.appliancepartspros.com/partsearch/model.aspx?model_id=5164885

The link (#24) probably broke and the spring (#18) probably shot off and is lying somewhere behind the dishwasher. Just pull out the dishwasher (careful not to disconnect or crimp any of the hoses) and check to see if both springs (one on each side) can be located. Just replace the old links and re-hook the springs and all should be well.

You can order the link replacement (part #8194001) from kitchenaid at 1-800-422-1230.

I recently had the same problem. One of the cords that attaches the door to a spring had snapped. I purchased cord replacments at the following URL and completed the repair myself. http://www.repairclinic.com/SmartSearch/SSPartDetail.aspx?PartID=1059756&PPStack=1

Good Luck, Tim K.

There is normally 2 heavy springs & cables that control the "falling" of the door located in the bottom of the machine or it the door itself. Sounds like one (or both) have snapped.