I set the dishwasher Siemens SL84A to regular wash cycle . I hear it click like its going to start, warm water fills the bottom up the tub but it never kicks into the wash cycle. Hit the cancel cycle and all the water drains out. What's wrong with it?

SOURCE: My Siemens SE64A630GB does not drain.

Could be the pump or controller has failed if no blockages.

SOURCE: Siemens dishwasher not running.

hi there sounds like the wash pump has become ceased, isolate unit from power and remove left hand side panel the wash pump will will now be visible, gentle turn the induction cooling fan at the rear of the motor being careful not to damage the field windings then restart the prog.

SOURCE: Not starting wash cycle

Typically this means that there has been a water leak of some sort and there is water in the lower base pan. This is the large white plastic base that the dishwasher sits on.

If you remove the toe kick and look back past the fill valve on the extreme left side of the dishwasher about 6 to 8 inches from the front you will see a red stick that goes straight up and down. This is a mechanical linkage that activates the drain feature. Be careful as there are live connections here.

This stick rests on a round piece of Styrofoam that acts as a float. If there is water present it will cause the stick to lift and the dishwasher will go into drain. The source of the leak will have to be isolated and corrected. Most likely it is the fill float assembly as referenced at the end of this post.

If the stick is not in the upright position then there is possibly an issue with the switch mechanism itself.

You will have to pull the dishwasher out from beneath the cabinet and remove the panel covering the left hand side. If it is a full panel then there are a couple of screws holding it on from the front through side trim as viewed when the door is open if it is a half panel then it can be removed by removing the large torx screw on the lower right as seen when facing the panel.

If there is a problem with the switch then the entire mechanism should be replaced.

Try the following link to a picture for reference. It is upside down as compared to the installed one:

http://www.repairclinic.com/SmartSearch/SSPartDetail.aspx?PartID=935595&PPStack=1

SOURCE: Dishwasher won't drain all the way

After cleaning the air gap thingy my machine works fine again. This thing sits on the left lower back side of the machine (left when you are standing in front of the machine). It is a transparent plastic box with 3 hoses attached (drain hose from pump, drain hose to the outside and water). Inside the box is a black plastic float. If debris gets caught in there the float gets stuck.
Solution is to remove the part by pulling the 2 drain hoses out (there is a small black clip holding them in) and unclamp and remove the water hose. Rinse and shake the housing until the float moves freely again and reassemble.

SOURCE: kitchenaid dishwasher - water standing at end of cycle

less than 2 cups of water in left after cycle complete