Dishwasher power switches off after a few seconds or once door is open

We had a similar problem during the last couple of months which is, it would run a few seconds and then cease. We’d have to re-run it 4-5 times and hopefully wait for it to begin its cycle. Ours is an 8 yr old Whirlpool, Gold Series. I did come across a few blogs and decided to try out one before I sourced a local technician viz. using a small screw-driver (watch repair types) and inserted it into the latch slot located on the inner top side of the door and it seemed to release a teeny plastic lever as well as lift out some accumulated debris (the blog states one hears a ‘click’ sound!!!). For added measure we cleaned the filter and closed the door whereupon we heard a distinct ‘clap’ sound (one which we’d never heard before) and …..WALLAH, it started right away. Apparently, the hook located on the main body opposite the latch wasn’t engaging, possibly as that teeny lever had shifted to the side and probably that is why the unit wasn’t able to initiate into motion. But, boy are we glad..****** :-)