I push the dishwasher door closed and it does not latch at all, meaning I can pull it open without any resistance and do not have to push the door handle button up.

Also, I don't think this is the problem at all, but the door handle is easily moved up and down and does not appear to have a spring on it (if it's even supposed to in the first place).

I opened up the control panel and looked at the mechanism. I tested out the switch by pushing the button for the switch all the way down, heard it click, and then started up the dishwasher for a moment (while the door was open). The dishwasher started up so the switch is working fine. Problem is I can neither close the door securely nor get the switch button to be fully pressed down when the door is closed.

Is there a problem with the latch...or the strike plate on the tub...or a switch actuator(I have no clue what that is, by the way). Please tell me what part(s) I need to buy from your site to get this working. Thanks so much for your assistance.

I included some pictures. Not sure if they will be of any assistance, but hopefully they help you to diagnose the problem.