The chap in NZ is an appliance specialist - he answers questions on here with deep knowledge and experience behind him - he signs off as Lincoln Appliance NZ - too far for a service call.
Given you admission that you're unsure about your machine then perhaps a local appliance engineer would be a good call for you to make.
As for your Microswitch it's possible that it could be defective - microswitches do fail now and again. The switch will be there as some kind of interlock - to stop operation if the door is opened perhaps - the little operating button should give you a clue - what on the dishwasher depresses the button?
Lincoln Appliance & Electrical
Te Atatu Rd, Te Atatu Peninsula,
Auckland 0610, New Zealand
Phone: +64 21 170 3520
Good Luck...
March 2017