The door of the dishwasher just falls down with the weight

there are springs with cables in most dishwashers i never had that problem but i did replace one spring that had broken. making it fall to fast. its no to hard if your handy. most appliance parts stors if there good should be able to help if they can be adjusted
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not sure why but i can,t see brand of your dishwasher

If the dishwasher is brand new, then there is an issue with the configuration of the springs, i.e not mounted correctly. A factory dishwasher door should not need to be adjusted. However if it is older, it is possible that the springs came off, in which case they can be seen from the underside of the dishwasher and by a panel that unscrews on the bottom of the door. Make sure the springs are there.

check an replace door spring

There is a plastic unit behind the door handle which houses a spring under tension. This latches the door closed and makes the electrical connection to allow the machine to work properly. You need to buy a new unit (£15) which is a bit fiddly to reach but easy to fit (2 screws)

Hi,

If your door falls down or is noisy I have put together some instructions here on how to repair. You will need a kit part number 8194001, it is relatively inexpensive, let me know if you have questions.

Door falling down or creaking

sounds like one or both of your door links are broken check your hinges. you should ahave a large spring and a piece of rope that attaches to the door. let me know if this helps you

the door links are broken need to get new ones and replace

There is a T20 screw located above the tub (open door to view) toward the left side. Tighten this screw a turn at a time, testing the apparrent door weight between turns until the door is neutral.

http://www.mieleusa.com/manuals_pdf/Residential/Dishwashers/English_manuals/Installation_Instructions/Full_Integrated_install.pdf

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.