If your dishwasher door feels loose or freefalls down from a closed position with a bang, then there is likely to be a problem with the hinge spring.
Use thie genuine replacement door hinge spring to restore your dishwasher door to falling smoothly and slowly, coming to a horizontal position gently without causing damage to your dishwasher and its hinges.
Please check the model fit list to ensure that this part is correct for your model.